78 FR 58460 - Revision of Air Quality Implementation Plan; California; Placer County Air Pollution Control...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-24

...EPA is finalizing a limited approval and limited disapproval of two permitting rules submitted by California as a revision to the Placer County Air Pollution Control District (PCAPCD) and Feather River Air Quality Management District (FRAQMD) portion of the California State Implementation Plan (SIP). These revisions were proposed in the Federal Register on February 22, 2013 and concern construction and modification of stationary sources of air pollution within each District. We are approving local rules that regulate these emission sources under the Clean Air Act as amended in 1990 (CAA). Final approval of these rules makes the rules federally enforceable and corrects program deficiencies identified in a previous EPA rulemaking (76 FR 44809, July 27, 2011). EPA is also making a technical amendment to the Code of Federal Regulations (CFR) to reflect this previous rulemaking, which removed an obsolete provision from the California SIP.

78 FR 12243 - Interim Final Determination To Stay and Defer Sanctions, Placer County Air Pollution Control...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-22

...EPA is making an interim final determination to stay the imposition of offset sanctions and to defer the imposition of highway sanctions based on a proposed approval of a revision to the Placer County Air Pollution Control District (PCAPCD) and Feather River Air Quality Management District (FRAQMD) portion of the California State Implementation Plan (SIP) published elsewhere in this Federal Register. The SIP revision concerns two permitting rules submitted by the PCAPCD and FRAQMD, respectively: Rule 502, New Source Review, and Rule 10.1, New Source Review.

76 FR 71922 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-21

... from coatings and strippers used on wood products, wood paneling, and miscellaneous metal parts and...: PCAPCD Rule 236 (Wood Products and Coating Operations), PCAPCD Rule 238 (Factory Coating of Flat Wood...

78 FR 6736 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control District

Federal Register 2010, 2011, 2012, 2013, 2014

2013-01-31

...; Clarification to Appendix D of November 24, 1987 Federal Register Notice,'' (Blue Book), notice of availability... Book and 52 FR 45109, November 24, 1987). We believe that all such revisions in Rules 301-306 include... technologic and economic feasibility, for reasons including the following: (1) PCAPCD Rules 302- 303 implement...

75 FR 24406 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-05

... Metropolitan Air Quality Management District, San Joaquin Valley Unified Air Pollution Control District, and South Coast Air Quality Management District AGENCY: Environmental Protection Agency (EPA). ACTION... Air Pollution Control District (PCAPCD), Sacramento Metropolitan Air Quality Management District...

75 FR 24544 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-05

... Metropolitan Air Quality Management District, San Joaquin Valley Unified Air Pollution Control District, and South Coast Air Quality Management District AGENCY: Environmental Protection Agency (EPA). ACTION... District (PCAPCD), Sacramento Metropolitan Air Quality Management District (SMAQMD), San Joaquin Valley...

77 FR 2643 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control District

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-19

... Register on September 6, 2011 and concerns oxides of nitrogen (NO X ) emissions from biomass fuel-fired... SIP. Rule Rule title Amended Submitted PCAPCD 233 Biomass Boilers 12/10/09 05/17/10 We proposed a... emission limits for biomass boilers found in Section 301 implement RACT. Our proposed action contains more...

76 FR 67366 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-01

... Metro Air Quality Management District AGENCY: Environmental Protection Agency (EPA). ACTION: Direct... Pollution Control District (PCAPCD) and Sacramento Metro Air Quality Management District (SMAQMD) portions..., this action: Is not a ``significant regulatory action'' subject to review by the Office of Management...

77 FR 73391 - Approval of Air Quality Implementation Plans; California; Eastern Kern, Imperial County, Placer...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-12-10

.... Federal eRulemaking Portal: www.regulations.gov . Follow the on- line instructions. 2. Email: R9airpermits... FURTHER INFORMATION CONTACT: Lisa Beckham, Permits Office (AIR-3), U.S. Environmental Protection Agency, Region IX, (415) 972-3811, beckham.lisa@epa.gov . SUPPLEMENTARY INFORMATION: This document proposes to...

76 FR 54993 - Revisions to the California State Implementation Plan, Placer County Air Pollution Control District

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-06

... nitrogen (NO X ) emissions from biomass fuel-fired boilers. We are proposing action on a local rule that... Submitted PCAPCD 233 Biomass Boilers......... 12/10/09 05/07/10 On June 8, 2010, the submittal for PCAPCD... from biomass boilers and steam generators. EPA's technical support document (TSD) has more information...

A Placer-Gold Evaluation Exercise.

ERIC Educational Resources Information Center

Tunley, A. Tom

1984-01-01

A laboratory exercise allowing students to use drillhole data to simulate the process of locating a placer gold paystreak is presented. As part of the activity students arithmetically compute the value of their gold, mining costs, and personal profits or losses, and decide on development plans for the claim. (BC)

Computer Program for Point Location And Calculation of ERror (PLACER)

USGS Publications Warehouse

Granato, Gregory E.

1999-01-01

A program designed for point location and calculation of error (PLACER) was developed as part of the Quality Assurance Program of the Federal Highway Administration/U.S. Geological Survey (USGS) National Data and Methodology Synthesis (NDAMS) review process. The program provides a standard method to derive study-site locations from site maps in highwayrunoff, urban-runoff, and other research reports. This report provides a guide for using PLACER, documents methods used to estimate study-site locations, documents the NDAMS Study-Site Locator Form, and documents the FORTRAN code used to implement the method. PLACER is a simple program that calculates the latitude and longitude coordinates of one or more study sites plotted on a published map and estimates the uncertainty of these calculated coordinates. PLACER calculates the latitude and longitude of each study site by interpolating between the coordinates of known features and the locations of study sites using any consistent, linear, user-defined coordinate system. This program will read data entered from the computer keyboard and(or) from a formatted text file, and will write the results to the computer screen and to a text file. PLACER is readily transferable to different computers and operating systems with few (if any) modifications because it is written in standard FORTRAN. PLACER can be used to calculate study site locations in latitude and longitude, using known map coordinates or features that are identifiable in geographic information data bases such as USGS Geographic Names Information System, which is available on the World Wide Web.

78 FR 13379 - Wrangell-St. Elias National Park and Preserve, Alaska; Proposed Mining Plan of Operations

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-27

...] Wrangell-St. Elias National Park and Preserve, Alaska; Proposed Mining Plan of Operations AGENCY: National...) unpatented placer claims within Wrangell-St. Elias National Park and Preserve. Public Availability: This plan...: Wrangell-St. Elias National Park and Preserve Headquarters, Mile 106.8 Richardson Highway, Post Office Box...

Oak management by county jurisdictions in the central Sierra Nevada, California

Treesearch

Richard R. Harris; Susan D. Kocher

2002-01-01

We evaluated county planning policies and procedures to determine what protection is provided to oak woodlands during the land development process. We selected three Sierra Nevada counties to do a pilot assessment: El Dorado, Placer and Madera. The assessment methodology included three components: 1) analysis of county plans, policies, guidelines, and ordinances to...

75 FR 22100 - Nevada County and Placer County, CA, Resource Advisory Committee

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-27

... the meeting is to discuss issues relating to implementing the Secure Rural Schools and Community Self... Title II funds benefiting National Forest System lands on the Humboldt-Toiyabe, Eldorado, Lake Tahoe...

75 FR 4102 - Folsom Lake State Recreation Area and Folsom Power House State Historic Park General Plan...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-01-26

... Branch, 350 Nevada Street, Auburn, CA 95603. Placer County Library, Granite Bay Branch, 6475 Douglas Boulevard, Granite Bay, CA 95746 . Before including your name, address, phone number, e-mail address, or...

75 FR 63436 - Nevada and Placer Counties Resource Advisory Committee

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-15

... DEPARTMENT OF AGRICULTURE Forest Service Nevada and Placer Counties Resource Advisory Committee AGENCY: Forest Service, USDA. ACTION: Notice of meeting. SUMMARY: The Nevada and Placer Counties Resource... Counties. ADDRESSES: The meeting will be held at the Placer County Water Agency office, 144 Ferguson, Rd...

Monazite in Atlantic shore-line features

USGS Publications Warehouse

Dryden, Lincoln; Miller, Glen A.

1954-01-01

This report is a survey of present and potential production of monazite from part of the Maryland-Florida section of the Atlantic Coastal Plain. The part of the Coastal Plain covered here is the outer (shore-ward) half. In this area, all the large heavy-mineral placers so far discovered occur in sand bodies that, by their shape, size, orientation, and lithology, appear to be ancient beaches, spits, bars, or dunes. Smaller placers have produced from recent shore-line features. The inner part of the Coastal Plain, to be treated in another report, is underlain generally by older rocks, ranging in age from Cretaceous to older Pleistocene. Only two large heavy-mineral placers are now in production at Trail Ridge, and near Jacksonville, both in Florida. Production is planned for the near future near Yulee, Fla.: in Folkston, Ga.: and at one or two localities in eastern North Carolina. Each of these three will produce monazite as a byproduct; the total new reserve for the three placers is about 33,000 tons of monazite. In large heavy-mineral placers of this type, monazite has not been found to run more than about 1 percent of total heavy minerals. In some large placers, notably Trail Ridge, it is almost or completely lacking. No reason for its sporadic occurrence has been found in this investigation. Two placers of potential economic value have been found by this project in Virginia, one west and one east of Chesapeake Bay. Neither is of promise for monazite production, but if they serve to open up exploration or production in the area, there is a chance for monazite as a byproduct from other placers. A discovery of considerable scientific interest has to do with the occurrence of two different suites of heavy minerals in the Coastal Plain, at least south of Virginia. One, an “older” suite, lacks epidote, hornblende, and garnet; this suite occurs in all older formations and in Pleistocene deposits lying above about 50 or 60 feet above sea level. The other, “younger” suite contains these three minerals: it is restricted to recent beaches and streams, and to Pleistocene deposits at low altitudes. Monazite may occur with either of these suites. The percentage of titania (TiO2) in illmenite is of both scientific and economic interest. Illmenite is by far the most sought-for mineral in present exploration, and whether it contains the “normal” 53 percent of titania or, as it commonly does in Florida, 60 percent, is often of decisive importance in its exploitation. The nature, time, and place of this “enrichment” in titania has not been worked out. The heavy-mineral industry of the area seems to give promise of considerable expansion in the near future, and a greater monazite production seems assured.

75 FR 13253 - Plan Revision for Lake Tahoe Basin Management Unit, Alpine, El Dorado, and Placer Counties, CA...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-03-19

... need for change document, the ``CER'' (Nov 2006) is available online at: http://fs.usda.gov/ltbmu... Report (CER)'' and request for public and partner agency comments specific to the unit's need for change...

Geochemistry of placer gold, Koyukuk-Chandalar mining district, Alaska

USGS Publications Warehouse

Mosier, E.L.; Cathrall, J.B.; Antweiler, J.C.; Tripp, R.B.

1989-01-01

The Koyukuk-Chandalar mining district of the Brooks Range mineral belt in north-central Alaska contains numerous placer gold deposits but few known lode gold sources. Gold grains, collected from 46 placer localities and 6 lode gold sites in the district, were analyzed for Ag and 37 trace elements utilizing direct current-arc optical emission spectroscopy. When possible, several measurements were made on each sample and averaged. Gold content was calculated by the summation of the 38 elements determined and subtracting from 100. The objectives of our study were to characterize the deposits by defining the type and number of distinct geochemical characteristics for the Au, to determine relationships of Au in placer deposits to possible lode sources (placer and lode), to identify possible primary sources of placer gold, and to study processes of placer formation. Interpretation of results emphasize that the Au grains are almost invariably ternary (Au-Ag-Cu) alloys. The average Cu content is 0.040% and the average Ag content and fineness [(Au/Au+Ag)??1,000] are 10.5% and 893 parts per thousand, respectively, for the 46 placer localities. Six geochemically distinct types of placer gold can be identified in the Koyukuk-Chandalar mining district based on Ag and Cu values. One type with an average Ag content of 21.2%, an average Cu content of 0.007%, and 786 average fineness is found only in the eastern part of the district. Placer gold grains that have an average Ag content of 6.0%, an average Cu content of 0.276%, and 940 average fineness were found in the western part of the district. Four intermediate types generally occur in order across the district. Variations in the chemistry of the placer gold can be related to variable depositional environments at the primary gold sources. Placer gold geochemistry is important in determining the origin and depositional environment of the primary Au sources and could add to the knowledge of the thermal history of the southcentral Brooks Range. ?? 1989.

Sedimentological controls on gold in a late Pleistocene glacial placer deposit, Cariboo Mining District, British Columbia, Canada

NASA Astrophysics Data System (ADS)

Eyles, Nicholas; Kocsis, Stephen P.

1989-11-01

It is a widely perceived notion that glaciation results in dispersal of mineralized bedrock and that sedimentary concentrates of economic minerals (placers) rarely occur in glaciated basins. This paper describes economic gold placers within late Pleistocene glacial and related fluvial sediments of the Cariboo Mining District in central British Columbia, Canada. The area has been defined as a "giant" gold placer; total production since 1858 is over 93,000 kg. The oldest and volumetrically largest placers occur in fluvial gravels and valley-side fan deposits deposited during a long non-glacial interval from as early as 125,000 to 30,000years B.P. The richest placers are found along bedrock "gutters" in the deepest parts of valleys, indicating repeated fluvial reworking of the valley infills. Braided and "wandering gravel bed" fluvial facies can be identified. Glacial placers, that overlie the fluvial placers, occur within lodgement till complexes deposited below the late Wisconsin Cordilleran ice sheet after 30,000 years B.P. The basal portions of lodgement tills are commonly enriched in gold as a result of incorporation from older gravels. Subglacial meltwaters created a highly effective sluicing system and left lucrative pay zones along meltwater-cut channels on bedrock benches, within intraformational gravels in lodgement till and within "lee-side" deposits down-ice of bedrock highs. "Lee-side" deposits are essentially water-worked talus slopes that accumulated in subglacial cavities. Finally, postglacial "wandering gravel-bed rivers" have repeatedly reworked older placers resulting in rich pay zones at the base of extensive bar platform deposits. Similar sedimentological controls on gold distribution can be identified in other glacial placers of late Cenozoic and Paleozoic age in North America, southern Africa and Australia. A distinction is drawn between these placers, all characterized by coarse-grained, nuggety gold, and the more well-known Precambrian and Paleozoic placers where finely-comminuted gold is dispersed through large thicknesses of rock. Episodes of glaciation typically occur after long periods of tropical and subtropical weathering when supergene processes were active and glaciers were able to remove and concentrate coarse gold. In contrast, gold in non-glacial placers of Precambrian and Paleozoic age has been through many cycles of erosion and transport and coarse gold is uncommon.

43 CFR 3832.20 - Lode and placer mining claims.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false Lode and placer mining claims. 3832.20... MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) LOCATING MINING CLAIMS OR SITES Types of Mining Claims § 3832.20 Lode and placer mining claims. ...

77 FR 63311 - Lake Clementine Hydro, LLC; Notice of Successive Preliminary Permit Application Accepted for...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-10-16

... Dam on the North Fork of the American River, near the City of Auburn, Placer County, California. The... Fork Dam, Lake Clementine Hydro plans to install two 7.5 megawatt (MW) generation units, for a total... to study three alternative designs for the project. Applicant Contact: Mr. Magnus Johannesson...

40 CFR 440.140 - Applicability; description of the gold placer mine subcategory.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 40 Protection of Environment 29 2010-07-01 2010-07-01 false Applicability; description of the gold... AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine Subcategory § 440.140 Applicability; description of the gold placer mine subcategory. (a) The...

Mineral potential tracts for shoreline Ti-Zr placer deposits (phase V, deliverable 85): Chapter P in Second projet de renforcement institutionnel du secteur minier de la République Islamique de Mauritanie (PRISM-II)

USGS Publications Warehouse

Beaudoin, Georges

2015-01-01

Shoreline placer Ti deposits are composed of ilmenite, rutile, zircon, monazite, and magnetite in well-sorted, fine- to medium-grained sand in coastal dunes, beaches and inlets. In addition to titanium, zirconium, in particular, and rare earth elements (REE) have become a major source of value in shoreline placer deposits. Shoreline placer deposits form mostly on tropical beaches around the world (fig. 1), and consist of dark sand layers rich in heavy minerals that are resistant to mechanical abrasion and chemical weathering. According to Hamilton (1995), shoreline placer deposits supply approximately 80 percent of the world’s rutile production, 25 percent of ilmenite, 100 percent of zircon, and 50 percent of both monazite and xenotime.

Features of Inner Structure of Placer Gold of the North-Eastern Part Siberian Platform

NASA Astrophysics Data System (ADS)

Gerasimov, Boris; Zhuravlev, Anatolii; Ivanov, Alexey

2017-12-01

Mineral and raw material base of placer and ore gold is based on prognosis evaluation, which allows to define promising areas regarding gold-bearing deposit prospecting. But there are some difficulties in gold primary source predicting and prospecting at the North-east Siberian platform, because the studied area is overlapped by thick cover of the Cenozoic deposits, where traditional methods of gold deposit prospecting are ineffective. In this connection, detailed study of typomorphic features of placer gold is important, because it contains key genetic information, necessary for development of mineralogical criteria of prognosis evaluation of ore gold content. Authors studied mineralogical-geochemical features of placer gold of the Anabar placer area for 15 years, with a view to identify indicators of gold, typical for different formation types of primary sources. This article presents results of these works. In placer regions, where primary sources of gold are not identified, there is need to study typomorphic features of placer gold, because it contains important genetic information, necessary for the development of mineralogical criteria of prognosis evaluation of ore gold content. Inner structures of gold from the Anabar placer region are studied, as one of the diagnostic typomorphic criteria as described in prominent method, developed by N.V. Petrovskaya [1980]. Etching of gold was carried out using reagent: HCl + HNO3 + FeCl3 × 6H2O + CrO3 +thioureat + water. Identified inner structures wer studied in details by means of scanning electron microscope JEOL JSM-6480LV. Two types of gold are identified according to the features of inner structure of placer gold of the Anabar region. First type - medium-high karat fine, well processed gold with significantly changed inner structure. This gold is allochthonous, which was redeposited many times from ancient intermediate reservoirs to younger deposits. Second type - low-medium karat, poorly rounded gold with unchanged inner structure. Poor roundness of gold particles and preservation of their primary inner structures indicate close proximity of primary source.

78 FR 16490 - Placer County Water Agency; Notice of Authorization for Continued Project Operation

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-15

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 2079-000] Placer County Water Agency; Notice of Authorization for Continued Project Operation On February 23, 2011, the Placer County Water Agency, licensee for the Middle Fork American River Hydroelectric Project, filed an Application for a New License pursuant to the Federa...

Gold in placer deposits

USGS Publications Warehouse

Yeend, Warren; Shawe, Daniel R.; Wier, Kenneth L.

1989-01-01

Man most likely first obtained gold from placer deposits, more than 6,000 years ago. Placers account for more than two-thirds of the total world gold supply, and roughly half of that mined in the States of California, Alaska, Montana, and Idaho.Placer deposits result from weathering and release of gold from lode deposits, transportation of the gold, and concentration of the gold dominantly in stream gravels. Unless preserved by burial, a placer subsequently may be eroded, and either dispersed or reconcentrated.California has produced more than 40 million troy ounces of gold from placers, both modern and fossil (Tertiary). The source of the great bulk of the gold is numerous quartz veins and mineralized zones of the Mother Lode and related systems in the western Sierra Nevada region. The gold-bearing lodes were emplaced in Carboniferous and Jurassic metamorphic rocks intruded by small bodies of Jurassic and Cretaceous igneous rocks. Mineralization occurred probably in Late Cretaceous time. Significant amounts of placer gold also were mined along the Salmon and Trinity Rivers in northern California. Source of the gold is lode deposits in Paleozoic and Mesozoic metamorphic rocks that were intruded by Mesozoic igneous rocks.Alaska has produced roughly 21 million ounces of gold from placer deposits. Most (about 13 million ounces) has come from the interior region, including 7,600,000 ounces from the Fairbanks district and 1,300,000 ounces from the Iditarod district. Lode sources are believed to be mostly quartz veins in Precambrian or Paleozoic metamorphic rocks intruded by small igneous bodies near Fairbanks, and shear zones in Tertiary(?) quartz monzonite stocks at Iditarod. The Seward Peninsula has produced more than 6 million ounces of placer gold, including about 4,000,000 ounces from the Nome district. Most of the gold was derived from raised beach deposits. Source of the gold probably is Tertiary-mineralized faults and joints in metamorphic rocks of late Precambrian age.The Helena-Last Chance district, Montana, produced nearly 1 million ounces of gold from placers that were derived from lode deposits in the contact zones of the Cretaceous Boulder batholith granitic rocks intruded into upper Precambrian, Paleozoic, and Mesozoic sedimentary rocks. The Virginia City-Alder Gulch district, Montana, produced more than 2,600,000 ounces of gold, nearly all from placer deposits derived from quartz veins of uncertain age in Archean gneisses and schists. The Boise basin district, Idaho, produced about 2,300,000 ounces of gold, mostly derived from quartz veins in quartz monzonite of the Cretaceous Idaho batholith.

A unique ore-placer area of the Amur region with high-Hg gold

NASA Astrophysics Data System (ADS)

Melnikov, A. V.; Stepanov, V. A.; Moiseenko, V. G.

2017-10-01

This work presents the geological structure and a description of the gold-ore occurrences and gold placers of the Un'ya-Bom ore-placer cluster of the Amur gold-bearing province. The host rocks are Late Paleozoic and Mesozoic black shales. Intrusive formations occur rarely. The sublatitudinal Un'ya Thrust is the principal ore-controlling structure. Paleozoic sandstones are thrust over Mesozoic flysch deposits along the Un'ya Thrust. The gold-ore occurrences are represented by quartz-vein zones. The ores are gold-quartz, low-sulfide. Ore minerals are arsenopyrite, scheelite, ferberite, galena, and native gold. High-Hg native gold was revealed in the ore occurrences and placers. The high Hg content in native gold is explained by the presence of the frontal part of the gold-bearing column located within the cluster; the rich placers were formed due to crushing of this column.

43 CFR 3863.1-3 - Data to be filed in support of application.

Code of Federal Regulations, 2012 CFR

2012-10-01

... possible: If the claim be for a deposit of placer gold, there must be stated the yield per pan, or cubic... deposits of placer gold. If it be a building stone or other deposit than gold claimed under the placer laws..., giving their dimensions, value, and the course and distance thereof to the nearest corner of the public...

43 CFR 3863.1-3 - Data to be filed in support of application.

Code of Federal Regulations, 2013 CFR

2013-10-01

... possible: If the claim be for a deposit of placer gold, there must be stated the yield per pan, or cubic... deposits of placer gold. If it be a building stone or other deposit than gold claimed under the placer laws..., giving their dimensions, value, and the course and distance thereof to the nearest corner of the public...

43 CFR 3863.1-3 - Data to be filed in support of application.

Code of Federal Regulations, 2014 CFR

2014-10-01

... possible: If the claim be for a deposit of placer gold, there must be stated the yield per pan, or cubic... deposits of placer gold. If it be a building stone or other deposit than gold claimed under the placer laws..., giving their dimensions, value, and the course and distance thereof to the nearest corner of the public...

43 CFR 3863.1-3 - Data to be filed in support of application.

Code of Federal Regulations, 2011 CFR

2011-10-01

... possible: If the claim be for a deposit of placer gold, there must be stated the yield per pan, or cubic... deposits of placer gold. If it be a building stone or other deposit than gold claimed under the placer laws..., giving their dimensions, value, and the course and distance thereof to the nearest corner of the public...

Metallic particles from the Macha meteorite crater and several placer deposits in Iakutiia

NASA Astrophysics Data System (ADS)

Gurov, E. P.; Kolesov, G. M.; Kudinova, L. A.; Rakitskaia, R. B.; Samoilovich, L. G.

The composition of metallic particles from the Macha crater in Iakutiia is shown to be close to the composition of cosmogenic particles from the region of the Tungusk meteorite as well as Ukrainian placer deposits. A description is given of cosmogenic particles from placer deposits of northern Iakutiia, whose formation may be connected with a large impact event in the northeastern part of the USSR.

Preliminary evidence for the involvement of budding bacteria in the origin of Alaskan placer gold

USGS Publications Warehouse

Watterson, J.R.

1992-01-01

Lacelike networks of micrometre-size filiform gold associated wtih Alaskan placer gold particles are interpreted as low-temperature pseudomorphs of a Pedomicrobium-like budding bacterium. Submicron reproductive structures (hyphae) and other morphological features similar to those of Pedomicrobium manganicum occur as detailed three-dimensional facsimiles in high purity gold in and on placer gold particles from Lillian Creek, Alaska. In a scanning electron microscope survey, the majority of gold particles at nine Alaskan placer deposits appear to include gold that has accumulated chemically at low temperatures in and on the cells of P. manganicum. Similar bacterioform gold from a Paleozoic deposit in China and from the Precambrian Witwatersrand deposit in South Africa may indicate that bacterioform gold is widespread. -Author

A unique ore-placer cluster with high-Hg gold mineralization in the Amur region (Russia)

NASA Astrophysics Data System (ADS)

Stepanov, V. A.; Moyseenko, V. G.; Melnikov, A. V.

2017-02-01

This work presents the geological structure and a description of gold-ore manifestations and gold placers in the Un'ya-Bom ore-placer cluster of the Amur gold-bearing province. The host rocks are Late Paleozoic and Mesozoic black-shale formations. Intrusive formations are rare. The sublatitudinal Un'ya thrust fault, along which Paleozoic sandstones overlap Mesozoic flyschoid deposits, is regarded as an orecontrolling structure. Gold-quartz and low-sulfide ores are confined to quartz-vein zones. Ore minerals are arsenopyrite, scheelite, ferberite, galena, and native gold. Gold-ore manifestations and placers contain high-Hg native gold. The high Hg content in native gold is explained by the occurrence of the eroded frontal part of the gold-ore pipe in the ore cluster, a source of native gold.

Significant Metalliferous and Selected Non-Metalliferous Lode Deposits, and Selected Placer Districts of Northeast Asia

USGS Publications Warehouse

Ariunbileg, Sodov; Biryul'kin, Gennandiy V.; Byamba, Jamba; Davydov, Yury V.; Dejidmaa, Gunchin; Distanov, Elimir G.; Dorjgotov, Dangindorjiin; Gamyanin, Gennadiy N.; Gerel, Ochir; Fridovskiy, Valeriy Y.; Gotovsuren, Ayurzana; Hwang, Duk-Hwan; Kochnev, Anatoliy P.; Kostin, Alexei V.; Kuzmin, Mikhail I.; Letunov, Sergey A.; Jiliang, Li; Xujun, Li; Malceva, Galina D.; Melnikov, V.D.; Nikitin, Valeriy; Obolenskiy, Alexander A.; Ogasawara, Masatsugu; Orolmaa, Demberel; Parfenov, Leonid M.; Popov, Nikolay V.; Prokopiev, Andrei V.; Ratkin, Vladimir; Rodionov, Sergey M.; Seminskiy, Zhan V.; Shpikerman, Vladimir I.; Smelov, Alexander P.; Sotnikov, Vitaly I.; Spiridonov, Alexander V.; Stogniy, Valeriy V.; Sudo, Sadahisa; Fengyue, Sun; Jiapeng, Sun; Weizhi, Sun; Supletsov, Valeriy M.; Timofeev, Vladimir F.; Tyan, Oleg A.; Vetluzhskikh, Valeriy G.; Aihua, Xi; Yakovlev, Yakov V.; Hongquan, Yan; Zhizhin, Vladimir I.; Zinchuk, Nikolay N.; Zorina, Lydia M.

2003-01-01

Introduction This report contains a digtial database on lode deposits and placer districts of Northeast Asia. This region includes Eastern Siberia, Russian Far East, Mongolia, Northeast China, South Korea, and Japan. In folders on this site are a detailed database, a bibliography of cited references, descriptions of mineral deposit models, and a mineral deposit location map. Data are provided for 1,674 significant lode deposits and 91 significant placer districts of the region.

75 FR 65609 - Nevada and Placer Counties Resource Advisory Committee

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-26

... Federal Advisory Committee Act. The purpose of the meeting is to discuss projects submitted for funding and the expenditure of Title II funds benefiting National Forest System lands in Nevada and Placer...

76 FR 13172 - Placer County Water Agency

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-10

... Water Agency Notice of Application Tendered for Filing with the Commission and Establishing Procedural... County Water Agency e. Name of Project: Middle Fork American River Project f. Location: The Middle Fork...) h. Applicant Contact: Andy Fecko, Project Manager, Placer County Water Agency, 144 Ferguson Road...

43 CFR 3863.1 - Placer mining claim patent applications: General.

Code of Federal Regulations, 2013 CFR

2013-10-01

...) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT.... (a) The proceedings to obtain patents for placer claims, including all forms of mineral deposits excepting veins of quartz or other rock in place, are similar to the proceedings prescribed for obtaining...

43 CFR 3863.1 - Placer mining claim patent applications: General.

Code of Federal Regulations, 2011 CFR

2011-10-01

...) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT.... (a) The proceedings to obtain patents for placer claims, including all forms of mineral deposits excepting veins of quartz or other rock in place, are similar to the proceedings prescribed for obtaining...

43 CFR 3863.1 - Placer mining claim patent applications: General.

Code of Federal Regulations, 2014 CFR

2014-10-01

...) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT.... (a) The proceedings to obtain patents for placer claims, including all forms of mineral deposits excepting veins of quartz or other rock in place, are similar to the proceedings prescribed for obtaining...

43 CFR 3863.1 - Placer mining claim patent applications: General.

Code of Federal Regulations, 2012 CFR

2012-10-01

...) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT.... (a) The proceedings to obtain patents for placer claims, including all forms of mineral deposits excepting veins of quartz or other rock in place, are similar to the proceedings prescribed for obtaining...

Geomorphological control of gold distribution and gold particle evolution in glacial and fluvioglacial placers of the Ancocala-Ananea basin - Southeastern Andes of Peru

NASA Astrophysics Data System (ADS)

Hérail, Gérard; Fornari, Michel; Rouhier, Michel

1989-10-01

Gold placers are formed as a result of surficial processes but glacial and fluvioglacial systems are generally considered to be unfavourable for placer genesis. Nevertheless, some important glacial and fluvioglacial placers have been discovered and are currently being exploited in the Andes of Peru and Bolivia. In the Plio-Pleistocene Ananea-Ancocala basin (4300-4900 m above sea-level), the gold content of the various formations indicates that only glacial and fluvioglacial sediments related to the Ancocala and Chaquiminas Glaciations (middle and upper Pleistocene) contain gold in any notable quantity. Local concentrations of economic interest occur only where a glacier has cut through a primary mineralized zone. Glacial erosion of dispersed primary mineralizations does not produce high-content placers of the kind found in fluviatile environments. Gold distribution in tills is more irregular than in fluviatile sediments and no marked enrichment at bedrock occurs. The transition from a glacial to a fluvioglacial environment is characterized by an increase in gold content due to a relative concentration of the biggest gold flakes and by the appearance of a gold distribution pattern similar to that found in a fluviatile environment. During their transport by glacial and fluvioglacial processes, gold particles acquire specific features; the size and morphology of a gold flake population are determined by the sedimentological and geomorphological environment in which the flakes are carried.

Preliminary summary review of thorium-bearing mineral occurrences in Alaska

USGS Publications Warehouse

Bates, Robert G.; Wedow, Helmuth

1952-01-01

Thorium-bearing minerals are known at 47 localities in Alaska. At these localities the thorium occurs as a major constituent or in minor amounts as an impurity in one or more of the following 12 minerals: allanite, columbite, ellsworthite, eschynite, gummite, monazite, orangite, parisite, thorianite, thorite, xenotime, and zircon. In addition other minerals, such as biotite and sphene, are radioactive and may contain thorium. Several unidentified columbate minerals with uranium or thorium and uranium as major constituents have been recognized at some localities. The distribution, by type of deposit, of the 57 thorium occurrences is as follows: lode - 3, lode and placer - 1, granitic rock - 3, granitic rock and related placer - 14, and placer - 26. Of the four lode occurrences only the radioactive veins at Salmon Bay in southeastern Alaska and the contact metamorphic deposit in the Nixon Fork area of central Alaska warrant further consideration, although insufficient data are available to determine whether these two deposits have commercial possibilities. The remaining occurrences of thorium-bearing minerals in Alaska are limited to placer deposits and disseminations of accessory minerals in granitic rocks. In most of these occurrences the thorium-bearing minerals occur in only trace amounts and consequently warrent little further consideration. More data are needed to determine the possibilities of byproduct recovery of thorium-bearing minerals from several of the gold and tin placers.

76 FR 53665 - Nevada and Placer Counties Resource Advisory Committee

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-29

... relationships and to provide advice and recommendations to the Forest Service concerning projects and funding... discuss and vote on projects submitted for funding and the expenditure of Title II funds benefiting National Forest System lands in Nevada and Placer Counties. DATES: The meeting will be held Wednesday...

76 FR 53664 - Nevada and Placer Counties Resource Advisory Committee

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-29

... relationships and to provide advice and recommendations to the Forest Service concerning projects and funding... discuss and vote on projects submitted for funding and the expenditure of Title II funds benefiting National Forest System lands in Nevada and Placer Counties. DATES: The meeting will be held Friday...

76 FR 53664 - Nevada and Placer Counties Resource Advisory Committee

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-29

... relationships and to provide advice and recommendations to the Forest Service concerning projects and funding... discuss and vote on projects submitted for funding and the expenditure of Title II funds benefiting National Forest System lands in Nevada and Placer Counties. DATES: The meeting will be held Tuesday...

40 CFR 440.140 - Applicability; description of the gold placer mine subcategory.

Code of Federal Regulations, 2011 CFR

2011-07-01

... AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold... gold bearing ores from placer deposits; and (2) The beneficiation processes which use gravity... applicable to any mines or beneficiation processes which process less than 1500 cubic yards (cu yd) of ore...

77 FR 44155 - Administration of Mining Claims and Sites

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-27

... 1004-AE27 Administration of Mining Claims and Sites AGENCY: Bureau of Land Management, Interior. ACTION... on locating, recording, and maintaining mining claims or sites. In this rule, the BLM amends its... placer mining claims. The law specifies that the holder of an unpatented placer mining claim must pay the...

Family Functioning of Adolescents Who Parent and Place for Adoption.

ERIC Educational Resources Information Center

Geber, Gayle; Resnick, Michael D.

1988-01-01

Assessed family environments of 84 pregnant adolescents who recently made decision to parent or to place their babies for adoption. Results showed that adolescent parents or placers described their families as less functional than adolescent norms. Found no significant differences in family functioning between parents and placers. Vast majority of…

Progress report of southeastern monazite exploration, 1952

USGS Publications Warehouse

Overstreet, W.C.; Theobald, P.K.; White, A.M.; Cuppels, N.P.; Caldwell, D.W.; Whitlow, J.W.

1953-01-01

Reconnaissance of placer monazite during the field season of 1952 covered 6,600 square miles drained by streams in the western Piedmont of Virginia 5 North Carolina, South Carolina,, and Georgia. Emphasis during this investigation was placed on the area between the Savannah River at the border of South Carolina and Georgia and the Catawba River in North Carolina because it contains most of the placers formerly mined for monaziteo Four other areas along the strike of the monazite-bearing crystalline rocks were also studied, They center around Mt. Airy, N.C., Athens, Ga. Griffin, Ga. and LaGrange, Ga. In the Savannah River Catawba River district, studies indicate that even the highest grade stream deposits of more than 10 million cubic yards of alluvium contain less than 1 pound of monazite per cubic yard. The average grade of the better deposits is about 0 0 5 pound of monazite per cubic yard. Only trace amounts of niobium, tantalum, and tin have been detected in the placers. Tungsten is absent. Locally gold adds a few cents per cubic yard to the value of placer ground. The best deposits range in size from 1 to 5 million cubic yards and contain 1 to 2 pounds of monazite to the cubic yard. Hundreds of placers smaller than 1 million cubic yards exceed 2 pounds of monazite to the cubic yard and locally attain an average of 10 pounds Monazite deposits around Athens, Ga., are similar to the smaller deposits in the central part of the Savannah River - Catawba River district. A few small very low-grade monazite placers were found near Mt. Airy, N.C., Griffin, Ga., and LaGrange Ga., but they are of no economic value. The larger the flood plain and the farther it lies from the source of the stream, the lower is the monazite content of the sediment. Monazite cannot be profitably mined .from the crystalline rocks in the five areas. The alluvial placers are in stream sediments of post-Wisconsin age. Some pre-Wisconsin terrace gravel of small areal extent is exposed but it contains only a small amount of monazite Pre-Wisconsin to early post-Wisconsin colluvial sediments locally contain 2 pounds of monazite to the cubic yard. Mode of presentation of reports covering field work during the seasons of 1951 - 52 is given. No further reconnaissance will be undertaken, in the western monazite belt.

40 CFR 440.140 - Applicability; description of the gold placer mine subcategory.

Code of Federal Regulations, 2013 CFR

2013-07-01

... AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE... that produce gold or gold bearing ores from placer deposits; and (2) The beneficiation processes which... yards (cu yd) of ore per year, or to dredges which process less than 50,000 cu yd of ore per year, or to...

40 CFR 440.140 - Applicability; description of the gold placer mine subcategory.

Code of Federal Regulations, 2012 CFR

2012-07-01

... AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE... that produce gold or gold bearing ores from placer deposits; and (2) The beneficiation processes which... yards (cu yd) of ore per year, or to dredges which process less than 50,000 cu yd of ore per year, or to...

40 CFR 440.140 - Applicability; description of the gold placer mine subcategory.

Code of Federal Regulations, 2014 CFR

2014-07-01

... AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE... that produce gold or gold bearing ores from placer deposits; and (2) The beneficiation processes which... yards (cu yd) of ore per year, or to dredges which process less than 50,000 cu yd of ore per year, or to...

Radionuclides and Radiation Indices of High Background Radiation Area in Chavara-Neendakara Placer Deposits (Kerala, India)

PubMed Central

Derin, Mary Thomas; Vijayagopal, Perumal; Venkatraman, Balasubramaniam; Chaubey, Ramesh Chandra; Gopinathan, Anilkumar

2012-01-01

The present paper describes a detailed study on the distribution of radionuclides along Chavara – Neendakara placer deposit, a high background radiation area (HBRA) along the Southwest coast of India (Kerala). Judged from our studies using HPGe gamma spectrometric detector, it becomes evident that Uranium (238U), Thorium (232Th) and Potassium (40K) are the major sources for radioactivity prevailing in the area. Our statistical analyses reveal the existence of a high positive correlation between 238U and 232Th, implicating that the levels of these elements are interdependent. Our SEM-EDAX analyses reveal that titanium (Ti) and zircon (Zr) are the major trace elements in the sand samples, followed by aluminum, copper, iron, ruthenium, magnesium, calcium, sulphur and lead. This is first of its kind report on the radiation hazard indices on this placer deposit. The average absorbed dose rates (9795 nGy h−1) computed from the present study is comparable with the top-ranking HBRAs in the world, thus offering the Chavara-Neendakara placer the second position, after Brazil; pertinently, this value is much higher than the World average. The perceptibly high absorbed gamma dose rates, entrained with the high annual external effective dose rates (AEED) and average annual gonadal dose equivalent (AGDE) values existing in this HBRA, encourage us to suggest for a candid assessment of the impact of the background radiation, if any, on the organisms that inhabit along this placer deposit. Future research could effectively address the issue of the possible impact of natural radiation on the biota inhabiting this HBRA. PMID:23185629

Heavy-Mineral Placer Potential Map of the U.S. Continental Shelf, Western and Northern Gulf of Mexico

USGS Publications Warehouse

Shideler, Gerald L.

1988-01-01

The establishment of the Exclusive Economic Zone (EEZ) in 1983 by Presidential Proclamation opened for natural resource exploration a vast offshore frontier area contiguous to the United States and its territories. The EEZ extends from the seaward limit of state waters (3 nautical mi from shore) to 200 nautical mi offshore, and it includes the continental shelves. Within the context of the EEZ natural resource assessment effort, the purpose of this study is to delineate, on a regional basis, the potential for heavy-mineral placers on the U.S. Continental Shelf in the western and northern Gulf of Mexico from the United States-Mexico border to the Alabama-Florida state line. This map is intended to serve as a general guide for placer exploration. It shows favorable sea-floor areas for placer occurrence in water depths ranging from 0 to 100 fathoms (600 ft). The map can be used as a guide for focusing costly exploratory efforts, such as coring operations and geophysical surveys. The potential economic value of heavy-mineral placer concentrations on the U.S. Continental Shelf is a function of both geologic and economic variables. Geologic variables include the composition and concentration of the heavy-mineral assemblages and their environment of deposition. Economic variables include the current world market price of extracted metals, as well as the cost of mining, processing, and marketing the metals. These economic factors, in turn, are tempered by the nation1s socio-political climate, which determines its need for specific mineral resources at any given time.

Effects of residential development and landscape composition on the breeding birds of Placer county's foothill oak woodlands

Treesearch

Diana Stralberg; Brian Williams

2002-01-01

This study examines the effect of rural residential development and landscape composition on breeding birds in Placer County’s foothill oak woodlands. Point count survey data were used to construct generalized linear models for individual species' abundance or probability of occurrence, based on two sets of variables: GIS-derived landscape characteristics,...

78 FR 71026 - Environmental Impact Statement for the Lake Tahoe Passenger Ferry Project, Placer and El Dorado...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-27

... Lake Tahoe Passenger Ferry Project, Placer and El Dorado Counties and City of South Lake Tahoe... Statement (EIS) for the proposed Lake Tahoe Passenger Ferry Project. The project consists of a cross- lake ferry service with a South Shore Ferry Terminal at the Ski Run Marina in South Lake Tahoe, El Dorado...

43 CFR 3833.33 - How may I transfer, sell, or otherwise convey an association placer mining claim?

Code of Federal Regulations, 2013 CFR

2013-10-01

... 43 Public Lands: Interior 2 2013-10-01 2013-10-01 false How may I transfer, sell, or otherwise... MANAGEMENT (3000) RECORDING MINING CLAIMS AND SITES Filing Transfers of Interest § 3833.33 How may I transfer, sell, or otherwise convey an association placer mining claim? You may transfer, sell, or otherwise...

43 CFR 3833.33 - How may I transfer, sell, or otherwise convey an association placer mining claim?

Code of Federal Regulations, 2014 CFR

2014-10-01

... 43 Public Lands: Interior 2 2014-10-01 2014-10-01 false How may I transfer, sell, or otherwise... MANAGEMENT (3000) RECORDING MINING CLAIMS AND SITES Filing Transfers of Interest § 3833.33 How may I transfer, sell, or otherwise convey an association placer mining claim? You may transfer, sell, or otherwise...

43 CFR 3833.33 - How may I transfer, sell, or otherwise convey an association placer mining claim?

Code of Federal Regulations, 2011 CFR

2011-10-01

... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false How may I transfer, sell, or otherwise... MANAGEMENT (3000) RECORDING MINING CLAIMS AND SITES Filing Transfers of Interest § 3833.33 How may I transfer, sell, or otherwise convey an association placer mining claim? You may transfer, sell, or otherwise...

43 CFR 3833.33 - How may I transfer, sell, or otherwise convey an association placer mining claim?

Code of Federal Regulations, 2012 CFR

2012-10-01

... 43 Public Lands: Interior 2 2012-10-01 2012-10-01 false How may I transfer, sell, or otherwise... MANAGEMENT (3000) RECORDING MINING CLAIMS AND SITES Filing Transfers of Interest § 3833.33 How may I transfer, sell, or otherwise convey an association placer mining claim? You may transfer, sell, or otherwise...

Titanium minerals of placer deposits as a source for new materials

NASA Astrophysics Data System (ADS)

Kotova, Olga; Ponaryadov, Alexey

2015-04-01

Heavy mineral deposits are a source of the economic important element titanium, which is contained in ilmenite and leucoxene. The mineral composition of placer titanium ore and localization pattern of ore minerals determine their processing and enriching technologies. New data on the mineralogy of titanium ores from modern coastal-marine placer in Stradbroke Island, Eastern Australia, and Pizhma paleoplacer in Middle Timan, Russia, and materials on their basis are presented. The samples were studied by the following methods: optical-mineralogical (stereomicroscope MBS-10, polarizing microscope POLAM L-311), semiquantitative x-ray phase analysis (x-ray difractometer X'Pert PRO MPD). Besides microprobe (VEGA 3 TESCAN) and x-ray fluorescent analysis (XRF-1800 Shimadzu) were used. By the mineralogical composition ores of the both deposits are complex: enriched by valuable minerals. Apart from main ore concentrates it is possible to obtain accompanying nonmetallic products. This will increase the efficiency of deposit exploitation. Ilmenite dominates in ore sands of Stradbroke Island, and leucoxene dominates in the ores of the Pizhma titanium deposit. Australian ilmenite and its altered varieties are mainly characterized by a very high MnO content (from 5.24 to 11.08 %). The irregular distribution of iron oxides, titanium and manganese in the altered ilmenite was shown in the paper. E.g., in the areas of substitution of ilmenite by pseudorutile the concentrations of the given elements are greatly various due to various ratios of basic components in each grain. Their ratios are equal in the area of rutile evolution. Moreover, the high content of gold, diamonds and also rare earth elements (REE) and rare metals (their forms are not determined) were studied. We found native copper on the surface of minerals composing titanium-bearing sandstones of the Pizhma placer. According to the technological features of rocks (density and magnetic) studied placers are close. The obtained results of physical studies, mineral composition features, morphostructural characteristics and degree of alteration of titanium minerals from the placers specify a high potential of physical methods of processing (gravitational and magnetic separation, flotation) and possible application of combined methods of processing. Production of pigment titanium dioxide for further production of titanium white, paper, plastics etc is the usual application area of titanium concentrates. Titanium dioxide of high chemical purity is used to produce optically transparent glass, fiber optics, electronics (iPad), piezoceramics, in medical and food industry. We designed photocatalysts based on leucoxene from Pizhma placer. The results showed that the photocatalysts based on rutile, synthesized from leucoxene from Pizhma deposit, can be applied to decay phenols in water.

78 FR 34123 - Notice of Inventory Completion: San Francisco State University NAGPRA Program, San Francisco, CA

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-06

... from site CA-PLA-9 in Placer County, CA. This notice is published as part of the National Park Service... site CA-PLA-9 in Placer County, CA, by San Francisco State University personnel in conjunction with... point. The age of site CA-PLA-9 is unknown, but the site is located within the historically documented...

Gold in the hills: patterns of placer gold accumulation under dynamic tectonic and climatic conditions

NASA Astrophysics Data System (ADS)

Roy, Sam; Upton, Phaedra; Craw, Dave

2018-01-01

Formation of placer accumulations in fluvial environments requires 103-106 or even greater times concentration of heavy minerals. For this to occur, regular sediment supply from erosion of adjacent topography is required, the river should remain within a single course for an extended period of time and the material must be reworked such that a high proportion of the sediment is removed while a high proportion of the heavy minerals remains. We use numerical modeling, constrained by observations of circum-Pacific placer gold deposits, to explore processes occurring in evolving river systems in dynamic tectonic environments. A fluvial erosion/transport model is used to determine the mobility of placer gold under variable uplift rate, storm intensity, and rock mass strength conditions. Gold concentration is calculated from hydraulic and bedload grain size conditions. Model results suggest that optimal gold concentration occurs in river channels that frequently approach a threshold between detachment-limited and transport-limited hydraulic conditions. Such a condition enables the accumulation of gold particles within the framework of a residual gravel lag. An increase in transport capacity, which can be triggered by faster uplift rates, more resistant bedrock, or higher intensity storm events, will strip all bedload from the channel. Conversely, a reduction in transport capacity, triggered by a reduction in uplift rate, bedrock resistance, or storm intensity, will lead to a greater accumulation of a majority of sediments and a net decrease in gold concentration. For our model parameter range, the optimal conditions for placer gold concentration are met by 103 times difference in strength between bedrock and fault, uplift rates between 1 and 5 mm a-1, and moderate storm intensities. Fault damage networks are shown to be a critical factor for high Au concentrations and should be a target for exploration.

Comparative toxicity of inorganic contaminants released by placer mining to early life stages of salmonids

USGS Publications Warehouse

Buhl, Kevin J.; Hamilton, Steven J.

1990-01-01

The acute toxicities of four trace inorganics associated with placer mining were determined, individually and in environmentally relevant mixtures, to early life stages of Arctic grayling (Thymallus arcticus) from Alaska and Montana, coho salmon (Oncorhynchus kitsutch) from Alaska and Washington, and rainbow trout (Oncorhynchus mykiss) from Montana. The descending rank order of toxicity to all species and life stages was copper > zinc > lead > arsenic. For each of the three species, sensitivity to the inorganics was greater in juveniles than in alvenins or in swim-up fry. Arctic grayling from Alaska were more sensitive than the other species tested, including Arctic grayling from Montana. For Arctic grayling, sensitivity to all four inorganics was significantly greater in swim-up fry from Alaska than in alevins from Montana, and sensitivity to arsenic and copper was significantly greater in juveniles from Alaska than in juveniles from Montana. In tests with environmentally relevant mixtures (based on ratios of concentrations measured in streams with placer mining) of these four inorganics, copper was identified as the major toxic component because it accounted for ⩾97% of the summed toxic units of the mixture, and an equitoxic mixture of these inorganics showed less-than-additive toxicity. Total and total recoverable copper concentrations reported in five Alaskan streams with active placer mines were higher than the acutely toxic concentrations, either individually or in mixtures, that the authors found to be acutely toxic to Arctic grayling and coho salmon from Alaska. However, caution should be used when comparing our results obtained in “clear” water to field situations, because speciation and toxicity of these inorganics may be altered in the presence of sediments suspended by placer mining activities.

Placer and lode platinum-group minerals in south Kalimantan, Indonesia: evidence for derivation from Alaskan-type ultramafic intrusions

USGS Publications Warehouse

Zientek, M.L.

1992-01-01

Platinum-group minerals occur in significant proportions in placer deposits in several localities in South Kalimantan. They consist of Pt-Fe alloy that may be intergrown with or contain inclusions of Ir-Os-Ru alloy, laurite and chromite. Alluvial PGM found along Sungai Tambanio are in part derived from chromatite schlieren in dunitic bodies intruded into clinopyroxene cumulates that may be part of an Alaskan-type ultramafic complex. A chromitite schlieren in serpentinite from one of these dunitic bodies is anomalous in PGE. The chondrite-normalized PGE pattern for this rock, pan concentrates from this area, and PGM concentrates from diamond-Au-PGM placer deposits have an "M'-shaped pattern enriched in Ir and Pt that is typical of PGE-mineralization associated with Alaskan-type ultramafic complexes. -Authors

Supporting development of rural settlements as a means for controlling the growth of large cities: three case studies in Colombia.

PubMed

Noriega, M

1994-01-01

A hypothesis is advanced that forceful support to small rural settlements can fundamentally redefine regional development and alleviate acute problems facing cities. Colombia is divided into 32 territorial units (departments), 1056 municipalities, which are agglomerations of four or five villages. The three projects were carried out under one contract during early 1993 for the department of Valle de Cauca, a prosperous area located in the Pacific southwest. A master plan for urban development was designed for each of the three villages. The population of the village of Villagorgona was 13,399, which was to exceed 18,000 in less than 5 years. Community development priorities were centered on converting an irrigation canal into the axis of a linear park, building a civic center, and creating a road system. The village of El Placer had a population of 8349 and its priorities included the construction of an upgraded aqueduct and a civic center, the improvement of roadways, the rehabilitation of the river and integrating it into the fabric of the settlement, and the creation of an urban code for local authorities to control growth and development. The village of Amaime had a population of 3730 in 1992. The development plan called for integration with the aqueduct being planned in El Placer, creation of a civic center, construction of a sewage treatment plant, rehabilitation of existing river banks, development of a recreational center, and creation of an urban code. These case studies demonstrated that the villages had higher population growth than the capital city of Cali, the inhabitants preferred to remain in the villages because of their satisfaction with the quality of life, the communities were interested in creating neighborhood organizations for improving the environment, the villages served as service centers for outlying farm inhabitants, and manifest interest was identified in changing from the village status to municipal status.

Mercury Pollution in Soils from the Yacuambi River (Ecuadorian Amazon) as a Result of Gold Placer Mining.

PubMed

López-Blanco, Charo; Collahuazo, Luis; Torres, Sandra; Chinchay, Luis; Ayala, Diana; Benítez, Paulina

2015-09-01

Gold mining is known to generate important economic products but also to produce several types of contamination/pollution. We report here the first data about Hg concentrations in the soils of the Yacuambi River in the Ecuadorian Amazon. We analyzed soil samples to assess the extent of contamination caused by gold placer mining in this area. Hg concentrations in soils exceeded the local background concentrations. High concentrations of Mn, As, Pb, Cr, Cu, Fe and Zn in some soil samples were probably derived from the geology of the site, which is rich in polysulfides and metamorphic rocks. Placer mining may accelerate the natural release of these elements to the environment by the exposure of the bedrock to the atmosphere. Accumulation of Hg in the river soils may be a potential source of toxicity for aquatic life and a risk to human health in the future.

Coeval emplacement and orogen-parallel transport of gold in oblique convergent orogens

NASA Astrophysics Data System (ADS)

Upton, Phaedra; Craw, Dave

2016-12-01

Varying amounts of gold mineralisation is occurring in all young and active collisional mountain belts. Concurrently, these syn-orogenic hydrothermal deposits are being eroded and transported to form placer deposits. Local extension occurs in convergent orogens, especially oblique orogens, and facilitates emplacement of syn-orogenic gold-bearing deposits with or without associated magmatism. Numerical modelling has shown that extension results from directional variations in movement rates along the rock transport trajectory during convergence, and is most pronounced for highly oblique convergence with strong crustal rheology. On-going uplift during orogenesis exposes gold deposits to erosion, transport, and localised placer concentration. Drainage patterns in variably oblique convergent orogenic belts typically have an orogen-parallel or sub-parallel component; the details of which varies with convergence obliquity and the vagaries of underlying geological controls. This leads to lateral transport of eroded syn-orogenic gold on a range of scales, up to > 100 km. The presence of inherited crustal blocks with contrasting rheology in oblique orogenic collision zones can cause perturbations in drainage patterns, but numerical modelling suggests that orogen-parallel drainage is still a persistent and robust feature. The presence of an inherited block of weak crust enhances the orogen-parallel drainage by imposition of localised subsidence zones elongated along a plate boundary. Evolution and reorientation of orogen-parallel drainage can sever links between gold placer deposits and their syn-orogenic sources. Many of these modelled features of syn-orogenic gold emplacement and varying amounts of orogen-parallel detrital gold transport can be recognised in the Miocene to Recent New Zealand oblique convergent orogen. These processes contribute little gold to major placer goldfields, which require more long-term recycling and placer gold concentration. Most eroded syn-orogenic gold becomes diluted by abundant lithic debris in rivers and sedimentary basins except where localised concentration occurs, especially on beaches.

Nature and distribution of potential heavy-mineral resources offshore of the Atlantic Coast of the United States.

USGS Publications Warehouse

Grosz, A.E.

1987-01-01

The US is dependent on foreign imports of placer heavy minerals for a majority of its ilmenite and rutile, and virtually all of its monazite requirements. Although sand deposits in the SE US are important domestic sources of these heavy minerals (HM) and a number of other less well-known heavy-mineral species, global onshore reserves of placer minerals may fall short of demand in as few as 20 years. Insofar as they are important commodities for the future, offshore HM placers will become more important, but much research on them remains to be done. Results of recent offshore studies, based on surficial grab samples, indicate an average of about 2 weight percent HM in surficial Atlantic Continental Shelf (ACS) sediments, in strong contrast with previous estimates of an average of 0.16% HM. Although provocative, the information from these grab samples does not include the thickness of the HM deposits and thus their volume and tonnage cannot be estimated.-from Author

About some processes of replacement of PGM from the placers of Southern Siberia

NASA Astrophysics Data System (ADS)

Shvedov, G. I.; Knyazev, V. N.; Nekos, V. V.

2003-04-01

Authors observed a series of replacement (conversions) in PGM from gold-bearing placers of southern part of Krasnoyarsk region. These facts have mineralogical and genetic interest. In researched placers primary PGM are presented by solid solutions Os-Ir-Ru with different ratios of main elements from osmium to iridium (by classification of D. Harris and L. Cabri /5 /. At smaller amounts Pt-Fe and sperrylite are presented, and other PGM were found in single cases. In minerals of Os-Ir-Ru system the main typical replacement is the forming of edgings of phase (Os,Ir,Ru)S_2 upon the edges of native Os, Ir, Ru or rutheniridosmine. Usually, the process of transformation takes place in grains in a direction of the best permeability, i.e. along deformational gaps or along planes of cleavage, because the phases of this system are chemically stable. The structures of replacements are diversified: fulfillment of gaps, formation of edgings around the grains, selective replacement, forming of metacrystalls or metagrains. The thickness of forming edgings is not stable; boundaries have corrosion textures with penetration inside of replaced grain. The chemical composition of cations of forming disulfides depends upon the composition of primary mineral first of all, but it cannot be subject to this rule. For example, grains from placer of Bolshoy Khailyk river (Western Sayan) have a composition adequate to ruthenium (tab., No. 1) and are replaced by laurite more often (tab., No. 1-1). In Kuznetsky Alatau (placer of Talanovaya river) authors observed simultaneous replacement of osmium (with admixtures of Ru and Ir) (tab., No. 2) by laurite (tab., No. 2-1) and irarsite (tab., No. 2-2) along gaps. This fact is explained by more affinity of ruthenium to sulfur, then iridium and osmium to sulfur /2/. In conditions of low fugitivity of sulfur the edgings with more rare composition (Ir,Os,Ru)_3S_2 (tab., No. 3-1) are formed. It was observed by the authors on iridium (tab., No. 3) from placer of Sysim river (Eastern Sayan). The similar composition of phase was described by S.A.Toma and S.Murphy /6/. In placer of Talanovaya river (Kuznetsky Alatau) the edging of idealized composition Os_2S (tab., No. 4-1) are develops on the grain of Os-Ir-ruthenium (tab., No.4). It indicates deficit of sulfur in a solution. In case of increased concentration of arsenic the minerals of Os-Ir-Ru system (tab., No. 5) are replaced by diarsenides (anduoite - omeiite series) (tab., No. 5-1) or sulfoarsenides of these elements as it was observed in PGM from placer of Rudnaya river (Western Sayan). In the extremely rare cases at superposition of sulfurless and arsenicless solutions the replacement of alloys Os-Ir-Ru by exotic phases can happen. For example, authors find the grain of native iridium, which was heavily deformed and impregnated on microgaps by phases of generalized composition from Pt(Ni,Cu,Fe)_2 to Ir(Ni,Fe,Cu)_3 in placer of Bolshoy Khaylik river /7/. The forming of similar phases can be initiated by very specific conditions: the extremely reducing conditions, very low fugitivity of sulfur and oxygen, absence of other anion-forming elements, high activity of a nickel, iron and cooper. The similar phases were found in streak-schlieren chromitic ores in one massif of alpine-type ultramafic rocks of Koryak Highland /3/. Also rather rare replacement of platinum with the high contents of ruthenium and iridium (platruthenosmiridium by old nomenclature) (tab., No.6) by Pt-Fe alloys (tab., No.6-1). It was observed by authors in PGM from placer of Talanovaya river (Kuznetsky Alatau). In the system Pt-Fe most widespread placer-forming minerals are ferriferous platinum, tetraferroplatinum and isoferroplatinum. In placers that were investigated by the authors the Pt-Fe alloys most frequently is replaced by cuperite, which forms the various thickness edgings. It usual phenomenon in some cases becomes complicated by forming of narrow (first microns) intermittent band of high-standard gold on the boundary of cuperite and Pt-Fe alloy. Same edgings of gold round the grains of alloys with consequent overlap by a more broad band of cuperite were observed by S.A. Shcheka with the co-authors in PGM from placers of Far East /4/. According to these authors the forming of edgings of gold is connected to effect of gold-bearing solutions with low fugitivity of S and As on the Pt-Fe alloy. Hereinafter under the opinion of the quoted authors the concentrations of S and As have increased and cuperite or arsenides (sulfoarsenides) of platinum were formed. On ours opinion the forming of edgings of gold between PtS and Pt-Fe alloy may occur by two ways. At the first, the allocation of the bands of high-standard gold on the boundary Pt-Fe alloy and PtS was simultaneously with replacement. It is connected that the gold and silver was included in the crystalline of Pt-Fe alloys primary and at the time of replacement of this mineral these elements reduced to native phase because the entry to the lattice of cuperite is impossible. Such process can be presented as the following equation: (Pt,Pd,Au,Ag)_3Fe + 2S_2 =3(Pt,Pd)S + 3(Au,Ag)^0 + FeS There aren't crystallochemical prohibitions for such process. At the second, the gold from later solutions may penetrate deep into the grain through porous edging of cuperite and locate at the boundary of PtS and Pt-Fe alloy. Probability of these processes must be test by experiments. The cuperite edgings on Pt-Fe alloys are acquired by the band or metacrystalls of sperrilite later. It is connected to occurrence of arsenic in the system. A feature of the composition of these sperrylites is increased contents of those elements, which originally were included in the lattice of Pt-Fe alloys (Rh, Ir, Os). The complex replacements of Pt-Fe alloys were observed by the authors in placer Sysim river. Pt-Fe alloys from this placer are presented by small-sized isomeric grains and contain increased contents of rhodium (tab., No.7). This feature was reflected in phases of replacement. In one case the edgings of Rh-sperrylite thickness 15-30 microns rounds the grain of Pt-Fe alloy and between these minerals the thin intermittent band of mineral with adequate RhAs (cherepanovite?) composition is situated (tab., No.7-1). This association is complicated by formation of small-sized selections hollingworthite (tab., No.7-2). In the near-drift placers sperrylite occurs frequently. This mineral is brittle and havn't transported on distant distances, but it is chemically very stable phase. Nevertheless, it mineral is replaced by native platinum on the edgings frequently, that was observed by authors in placers of the rivers Coloromo, Danilovsky (Yenisei Ridge), Caragan (East Sayan) etc. This process can be finished by formation of the native platinum. According to T.L. Evstigneeva with co-authors /1/ the de-arsenization of sperrylite can happen only at rather high temperatures more 400^oC;. Therefore it cannot be attributed to process of low-temperature replacement in solid condition, and it is necessary to connect with temperature burning of sperrylite. The native platinum which was formed in it process differs from primary magmatic in high cleanness of composition and absence of any admixtures, except for As (tab., No.8, 8-1). References: 1.T.L.Evstigneeva, A.A.Kim, I.Ay.Nekrasov (1990) //About de-arsenization of sperrylite in nature. Mineralogical Zhurnal, vol.12, No3, pp.90-96 (in Russian). 2. A.A.Marakushev, N.I.Bezmen Thermodynamics of sulfides and oxides in connection with problems of ore-forming. - M., Nauka, 1972. - 230p (in Russian). 3. A.G.Mochalov, G.G.Dmitrenko, I.V.Zhernovskii, N.S.Rudashevskii (1985) New iridium-osmium-ruthenium type (solid solutions of rare platinum-group elements with iron) of platinum-group mineralization in chromium spinel-group minerals of alpine-type ultramafic rocks of Koryak Highland. - Zapiski Vses. Mineral. Obshch., 114, pp.544-554 (in Russian). 4. S.A.Shcheka, A.A.Vrzhosek, V.I. Sapin, N.I.Kiryukhina (1991) Trasformations of platinum-group minerals from Primor'ye placers. - Mineralogical Zhurnal, vol.13, No1, pp.31-40 (in Russian). 5. D.C.Harris, L.J.Cabri (1991) Nomenclature of platinum-group-element alloys: review and revision. - Canadian Mineralogist, vol.29, pp.231-237. 6. L.J.Cabri (ed.) (1978) Unnamed platinum-group minerals. In: Platinum-group elements: mineralogy, geology, recovery. - Canadian Institute of Mining and Metallurgy, Montreal, pp.177-195. 7. G.I.Shvedov, V.N.Knyazev Unnamed PGE Phases from Gold Placer Deposits of South Siberia, Russia. - 9th International Platinum Symposium, July 21-25, Billings, Montana, USA, 2002 (http://www.duke.edu/˜boudreau/IPS_Abstracts.htm).

Thorium resources of selected regions in the United States

USGS Publications Warehouse

Staatz, Mortimer Hay; Hall, R.B.; Macke, D.L.; Armbrustmacher, T.J.; Brownfield, I.K.

1980-01-01

Thorium resources have been assessed in a previous report entitled 'Principal thorium resources in the United States' (Staatz and others, 1979) for (1) veins in the larger districts, {2) massive carbonatites, {3) disseminated deposits, and {4) stream placers of North and South Carolina. This report is a sequel to that report and assesses thorium resources in {1) Florida beach placers, (2) Idaho stream placers, (3) veins and pipes in the Bokan Mountain district, Alaska, (4) carbonatite dikes, and {5) apatite-bearing iron deposits near Mineville, New York. Thorium resources for each of these categories are divided into reserves and probable potential resources. When data are available, each of these is then divided into the following cost categories: (1) the amount of ThO2 producible at a cost of less than $15/lb (per pound), (2) the amount producible at a cost of between $15 and $30/lb, and (3) the amount producible at a cost of between $30 and $50/1b. Beach placers of northern Florida have reserves of 16,200 short tons of ThO2 and probable potential resources of 5,120 tons of ThO2. These deposits are heavy-mineral placers that are mined for a variety of minerals--principally titanium minerals and zircon. The thorium-bearing mineral in these placers, monazite, makes up only a minor part of the heavy minerals. Therefore, production of ThO2 from these placers is dependent on the markets for other heavy minerals. Assuming the market for other heavy minerals to be the same as in 1978, then 98 percent of the ThO2 could be produced for less than $15/lb. If, however, no other coproducts were produced, then the cost of producing ThO2 would be greater than $50/1b. Stream placers containing thorium are found along many streams that drain the Idaho batholith, but most are too small to add significantly to the thorium resources. The resources of the five largest districts, each of which consists of at least several individual placers, have been tabulated. These districts are (1) Long Valley, (2) Bear Valley, (3) Burgdorf-Warren area, (4) Boise Basin, and (5) Ell City-Newsome area. These five areas have reserves of 10,100 short tons of ThO2 and probable potential resources of 10,300 tons. Long Valley contains about half the reserves--5,680 tons of ThO2--and all the probable potential resources. Monazite is the most important heavy mineral in all except the Bear Valley deposit. Here euxenite, although not quite as abundant as monazite, is a more important mineral, because it contains approximately 14.5 percent U3O8 in addition to 5 percent ThO2. Reserves in this placer amount to 1,605 short tons of ThO2 and 1,475 tons of U3O8. Eighty-two percent of the reserves and all of the probable potential resources can be produced at less than $30/1b of ThO2. The lower cost reserves are concentrated in the Long and Bear Valley areas. Here 64 percent of the ThO2 can be produced for less than $15/1b and another 29 percent of the ThO2 at between $15 and $30/lb. Sixteen veins and pipelike bodies are evaluated in the Bokan Mountain area of southeastern Alaska. The district contains other deposits that are too poorly exposed to make meaningful resource estimates. Reserves estimated in this district are 1,440 short tons of ThO2; probable potential resources amount to 2,320 tons of ThO2. About 99 percent of these resources are in deposits whose grade is at least 0.2 percent ThO2. In addition, these deposits contain reserves of 420 tons of U3O8 and probable potential resources of 820 tons of U3O8. Eighty-two percent of the reserves and probable potential resources can be produced at less than $15/lb. The average grade of this ore is 0.54 percent ThO2 and 0 15 percent U3O8. Some carbonatite dikes, although generally not as high grade as the veins, contain resources of thorium. Carbonatite dikes in the following six districts were investigated: (1) Wet Mountains, Colo.; (2) Powderhorn district, Colorado; (3) Mountain Pass area, California; (4) Bearpaw

Artifacts resembling budding bacteria produced in placer-gold amalgams by nitric acid leaching

USGS Publications Warehouse

Watterson, J.R.

1994-01-01

Microscopic filiform morphologies in gold which are indistinguishable from forms originally interpreted as bacterial in origin were produced in the laboratory by treating amalgams made from natural and artificial gold with hot nitric acid. Textures ranging from cobblestone to deeply crenulated to nodular filiform were produced in the laboratory from all tested natural and artificial gold amalgams; analogous textures widespread in Alaskan placer gold may have a similar inorganic origin. These results indicate that morphology alone cannot be considered adequate evidence of microbial involvement in gold formation.

Artifacts resembling budding bacteria produced in placer-gold amalgams by nitric acid leaching

USGS Publications Warehouse

Watterson, J.R.

1994-01-01

Microscopic filiform morphologies in gold which are indistinguishable from forms originally interpreted as bacterial in origin were produced in the laboratory by treating amalgams made from natural and artificial gold with hot nitric acid. Textures ranging from cobblestone to deeply crenulated to nodular filiform were produced in the laboratory from all tested natural and artificial gold amalgams; analogous textures widespread in Alaskan placer gold may have a similar inorganic origin. These results indicate that morphology alone cannot be considered adequate evidence of microbial involvement in gold formation. -Author

Titanium mineral resources of the western U.S.: an update

USGS Publications Warehouse

Force, Eric R.; Creely, Scott

2000-01-01

Thirteen deposits or districts in the western U.S. have been examined in which titaniummineral resources have been reported or implied. These deposits are of the following general types (in probable order of importance): 1) Cretaceous shoreline placer deposits, 2) silica-sand deposits of California, 3) fluvial monazite placers of Idaho, 4) anorthositerelated deposits, and 5) clay and bauxite deposits of the northwestern U.S. Relative to previous reports, this one shows some greater and some lesser resources (table 1). In any case, titanium-mineral resources of the western U.S. (west of 103° longitude) remain modest at world scale except as unconventional (especially perovskite) and by-product (especially porphyry) resources. Some deposits, however, have enhanced value to the titanium explorationist for the geologic relations they illustrate. Among the new conclusions are: a) Loci of Cretaceous shoreline placers form linear patterns, nested as a function of age, that can be traced for thousands of kilometers, permitting focused exploration in whole new mountain ranges. b) Medial hematite-ilmenite solid-solution, which is highly magnetic, is a major carrier of TiO2 values in the Cretaceous deposits of Wyoming. This phase was previously thought to be relatively rare. c) Regressive shoreline placer deposits in indurated Cretaceous sequences expose intricate facies relations, such as the construction of shoreface sequences by long-shore drift over tidal-channel fill, without much loss of paleogeographic information. d) Due to deep weathering, virtually every Eocene sediment that accumulated in the Ione basin at the foot of the Sierra Nevada has economic value, permitting recovery of altered ilmenite and zircon along with silica, clay, coal, and gold. Ilmenite is most abundant in newly recognized shoreline sands. e) Upper Tertiary fluvial placers of Idaho formed in and filled fault-bounded basins and thus are far more voluminous than deposits in the modern valley system. Previously reported resources are thus far too low. f) Mafic igneous rocks of Proterozoic age near Bagdad, Arizona are of ophiolitic affinity, but contain nelsonitic ilmenite enrichments associated with anorthositic layers.

Precambrian uranium-bearing quartz-pebble conglomerates: exploration model and United States resource potential

DOE Office of Scientific and Technical Information (OSTI.GOV)

Houston, R.S.; Karlstrom, K.E.

1979-11-01

Uranium has been discovered in fluvial quartz-pebble conglomerates in most of the Precambrian shield areas of the world, including the Canadian, African, South American, Indian, Baltic, and Australian shields. Occurrences in these and other areas are shown. Two of these occurrences, the Huronian supergroup of Canada and the Witwatersrand deposit of South Africa contain 20 to 30 percent of the planet's known uranium reserves. Thus it is critical that we understand the origin of these deposits and develop exploration models that can aid in finding new deposits. Inasmuch as these uranium-bearing conglomerates are confined almost entirely to rocks of Precambrianmore » age, Part I of this review begins with a discussion of Precambrian geology as it applies to the conglomerates. This is followed by a discussion of genetic concepts, a discussion of unresolved problems, and finally a suggested exploration model. Part II summarizes known and potential occurrences of Precambrian fossil placers in the world and evaluates them in terms of the suggested exploration model. Part III discusses the potential for important Precambrian fossil-placer uranium deposits in the United States and includes suggestions that may be helpful in establishing an exploration program in this country. Part III also brings together new (1975-1978) data on uranium occurrences in the Precambrian of the Wyoming Province. Part IV is a complete bibliography of Precambrian fossil placers, divided according to geographical areas. In total, this paper is designed to be a comprehensive review of Precambrian uranium-bearing fossil placers which will be of use to uranium explorationists and to students of Precambrian geology.« less

Granulometry and mineralogy of some northeastern Florida placers: a consequence of heavy mineral concentration in nearshore bars

NASA Astrophysics Data System (ADS)

Elsner, Harald

1992-03-01

Heavy mineral placer deposits of Pleistocene age in northeastern Florida were examined sedimentologically. Neither general setting, nor granulometric or mineralogic results are in agreement with a concentration of the heavy minerals in a beach, eolian or fluvial environment. Granulometric moment parameters of the ore sands seem to be distinctive. They include moderate sorting, high positive skewness, high kurtosis and a distinctive fine tail. Similarities of grain size curves of the placer sands with nearshore-offshore sands exist. Mineralogically the samples are more variable but always impoverished in epidote. This scarcity of epidote is atypical for eolian sediments in the study area, and the lack of garnet and the fineness of ore sands are uncommon for beach placers of northeast Florida. Underlain by dune ridges, which acted as obstacles on the shallow sea floor during the Penholoway transgression (1.3 ± 0.1 Ma B.P.), heavy minerals in the Boulogne and Green Cove Springs main ore body must have been concentrated in bars by the interplay of longshore and transverse bottom currents. Lighter heavy minerals were deposited in smaller nearshore bars closer to the former coast (Green Cove Springs small ore body) or in dunes of barrier islands (Green Cove Springs western ore body). As is true today, layers of noteworthy concentrations of economic minerals in the swash zone of Florida beaches were formed only rarely during storms, contrary to the coasts of Australia or India, where higher energetic conditions prevail. The proposed model of concentration of heavy minerals in certain outer nearshore bars has long been assumed but never been proven.

Noble Gases in Alpine Gold: U/Th-He Dating and Excesses of Radiogenic He and AR

NASA Astrophysics Data System (ADS)

Eugster, O.; Hofmann, B.; Krahenbuhl, U.; Neuenschwander, J.

1992-07-01

Gold precipitates in hydrothermal fluids along with other heavy elements, such as Ag and Pt. In order to explore the possibility of dating the formation of gold we determined the concentrations of U, Th, and their decay product ^4He, as well as the K and ^40Ar concentrations in vein-type gold and in placer gold samples. The gold-quartz veins at Brusson in the south-western alps were formed approximately 32 Ma ago during an episode of tectonic uplift (Diamond, 1990). Alpine material was deposited as sediment layers in the region of central Switzerland and placer gold is thus relatively abundant in the rivers of the Napf area. We washed placer gold from the river Grosse Fontanne in 1990 and 1991. Placer gold that had been collected from the river Kruempelgraben in 1933 and a sample of vein-type free gold grown on quartz rock from the Brusson area (Val d'Ayas) have been obtained from the Museum of Natural History in Bern. Table 1 gives the results. Most of the ^4He is released above 1050 degrees C, that is when gold melts, indicating that gold is extremely well retentive for He. From the ^4He concentration of (269 +- 20) x 10^-8 cm^3 STP/g, (0.4 +- 0.1) ppm U, and (0.9 +- 0.3) ppm Th for vein-type gold we calculate a U/Th-He age of (36 +- 8)Ma. This age agrees within errors with the proposed age of 32 Ma. The data given in Table 1 show that all placer gold samples contain excesses of radiogenic ^4He and ^40Ar relative to the concentrations expected from the U/Th and K decay, respectively, if we assume a formation age of 32 Ma. The quartz sample is depleted in ^4He but strongly enriched in radiogenic ^40Ar. The excess of ^40Ar(sub)rad is easier to explain than that of ^4He. Vein-type gold and placer gold contain quartz inclusions (Schmid, 1973). The high ^40Ar(sub)rad content of quartz (Table 1) indicates that the ^40Ar(sub)rad excess of gold originates from quartz inclusions. Excess ^4He in gold must be of radiogenic origin. Taking ^20Ne and ^36Ar as a measure for the quantity of trapped atmospheric noble gases we estimate atmospheric ^4He in the gold samples to be three to five orders of magnitude below the observed ^4He concentration. Placer gold is finely distributed in rock material and might be exposed to an alpha-particle irradiation from neighboring U/Th-rich minerals. An alternative He source are inclusions of U/Th-rich minerals, such as zircon, either within the gold material or mechanically worked into the spangles as they were part of the river detritus. Acknowledgement: We thank the Swiss NSF for their support. References: Diamond L.W. (1990) Am. J. of Science 290, 912-958. Schmid K. (1973) Schw. Min. Petr. Mitt. 53, 125-156. Table 1, which in the hard copy appears here, shows concentrations of He, Ne, and Ar (10^-8 cm^3 STP/g) and of K, Th, and U (ppm) in vein-type free gold, placer gold, and quartz. The ^3He and ^21Ne signals were below detection limits, that is ^4He/^3He in gold is >100'000. Average ^20Ne/^22Ne ratios in gold and quartz are 10.2 +- 0.2, that is about 4% larger than in the terrestrial atmosphere. Average ^36Ar/^38Ar = 5.2 +- 0.2 (within errors identical to ^36Ar/^38Ar in air). 1) Sample sizes 50-100 mg. 2) Radiogenic ^40Ar = ^40Ar-295.5 x ^36Ar. 3) Calculated from U/Th and ^40K decay.

Characteristics and origin of coarse gold in Late Pleistocene sediments of the Cariboo placer mining district, British Columbia, Canada

NASA Astrophysics Data System (ADS)

Eyles, N.

1995-02-01

The Cariboo placer mining district (1000 km 2) sited in the Interior Plateau of central British Columbia, Canada, is the premier placer gold mining district of the Province. Gold is recovered from three Late Pleistocene sedimentary facies: postglacial fluvial gravels (< 10 Ka), Late Wisconsin till (ca. 25-10 Ka), and "older" fluvial gravels (>25 Ka). This study reports the morphology (size, roundness, sphericity) of 1636 gold grains, ranging in size from 0.25 to 17 mm, recovered from 19 placer mines. Older gravels contain the smallest gold grains (mean grani size 1.53 mm), grains of intermediate size occur in till (2.23 mm) and the coarsest gold occurs in postglacial gravels (2.34 mm) with a mean of 1.93 mm for the mining district as a whole. The most common grain shapes are sub-rounded, discoidal (14.73% of the grain population), sub-angular, discoidal (10.88%), and sub-rounded, sub-discoidal (9.59%); the most angular grains occur in postglacial gravels. In-situ growth of coarse, angular grains is indicated by a "composite" grain structure, consisting of aggregates of gold particles welded together by high-grade (Ag = < 2%) filamentous gold; in-situ coarsening may be reliant on organic complexing agents produced below a dense forest cover. An evolutionary sequence of grain form, from angular aggregates to rounded "pumpkin seed" grains, is suggested. Rounded grains commonly show a crystalline structure which may result from the cold hammering of gold during transport; fracturing along crystal boundaries is common. Gold grains may undergo cycles of coarsening, rounding, diagenesis and breakup in response to repeated recycling through Pleistocene sedimentary environments.

Stream-Sediment Geochemistry in Mining-Impacted Drainages of the Yankee Fork of the Salmon River, Custer County, Idaho

USGS Publications Warehouse

Frost, Thomas P.; Box, Stephen E.

2009-01-01

This reconnaissance study was undertaken at the request of the USDA Forest Service, Region 4, to assess the geochemistry, in particular the mercury and selenium contents, of mining-impacted sediments in the Yankee Fork of the Salmon River in Custer County Idaho. The Yankee Fork has been the site of hard-rock and placer mining, primarily for gold and silver, starting in the 1880s. Major dredge placer mining from the 1930s to 1950s in the Yankee Fork disturbed about a 10-kilometer reach. Mercury was commonly used in early hard-rock mining and placer operations for amalgamation and recovery of gold. During the late 1970s, feasibility studies were done on cyanide-heap leach recovery of gold from low-grade ores of the Sunbeam and related deposits. In the mid-1990s a major open-pit bulk-vat leach operation was started at the Grouse Creek Mine. This operation shut down when gold values proved to be lower than expected. Mercury in stream sediments in the Yankee Fork ranges from below 0.02 ppm to 7 ppm, with the highest values associated with old mill locations and lode and placer mines. Selenium ranges from below the detection limit for this study of 0.2 ppm to 4 ppm in Yankee Fork sediment samples. The generally elevated selenium content in the sediment samples reflect the generally high selenium contents in the volcanic rocks that underlie the Yankee Fork and the presence of gold and silver selenides in some of the veins that were exploited in the early phases of mining.

Wilderness study area, mineral resources of the Sleeping Giant, Lewis and Clark County, Montana

DOE Office of Scientific and Technical Information (OSTI.GOV)

Tysdal, G.; Reynold, M.W.; Carlson, R.R.

1991-01-01

A Mineral resource survey was conducted in 1987 by the U.S. Geological Survey and the U.S. Bureau of Mines to evaluate mineral resources (known) and mineral resource potential (undiscovered) of the Sleeping Giant Wilderness Study Area (MT-075-111) in Lewis and Clark County, Montana. The only economic resource in the study area is an inferred 1.35-million-ton reserve of decorative stone (slate); a small gold placer resource is subeconomic. A high resource potential for decorative slate exists directly adjacent to the area of identified slate resource and in the northeastern part of the study area. The rest of the study area hasmore » a low potential for decorative slate. The westernmost part of the study area has a moderate resource potential for copper and associated silver in state-bound deposits in green beds and limestone; potential is low in the rest of the study are. The study area has a low resource potential for sapphires in placer deposits, gold in placer deposits (exclusive of subeconomic resource mentioned above), phosphate in the Spokane Formation, diatomite in lake deposits, uranium, oil, gas, geothermal energy, and no resource potential for phosphate in the Phosphoria Formation.« less

Placer tin deposits in central Alaska

USGS Publications Warehouse

Chapman, Robert Mills; Coats, Robert Roy; Payne, Thomas G.

1963-01-01

Placer tin, in the form of cassiterite (Sn02) and (or) tinstone (fragments including cassiterite and some vein or rock material), is known or reported in deposits that have been prospected or mined for placer gold in four areas adjacent to the Yukon River in central Alaska, 120 to 240 miles west of Fairbanks. These areas are: the Morelock Creek area, on the north side of the Yukon River about 30 miles upstream from Tanana; the Moran Dome area, about 16 miles north of the Yukon River and 25 miles northwest of Tanana; the Mason Creek area, on the north side of the Yukon River about 36 miles west of Tanana; and the Ruby-Long area, on the south side of the Yukon River near Ruby and about 40 miles east of Galena. The only extensive placer mining in these areas has been in the Ruby-Long area. Other placer deposits including some cassiterite are known in central Alaska but are not discussed in this report. Bedrock in these areas is predominantly schist of various types with some associated greenstone and other metamorphic rocks. Some granite is exposed in the Moran Dome and Ruby-Long areas and in areas close to Morelock and Mason Creeks. Barren, milky quartz veins and veinlets transecting the metamorphic rocks are common. No cassiterite was found in the bedrock, and no bedrock source of the tin has been reported. In the Moran Dome and Mason Creek areas, and in part of the Ruby-Long area, tourmaline is present in the rocks of the tin-bearing drainage basins, and apparently absent elsewhere in these areas. The placer deposits are in both valley floor and bench alluvium, which are predominantly relatively thin, rarely exceeding a thickness of 30 feet. Most of the alluvium deposits are not perennially frozen. In the Morelock Creek area tin-bearing deposits are 5 to 5? miles above the mouth of the creek, and meager evidence indicates that cassiterite and gold are present in Morelock Creek valley and some of the tributaries both upstream and downstream from these deposits. The concentrates recovered in samples average about 57 percent tin, and the gold averages about 922 fine. Prospecting indicates that the placer tin deposits are small and of relatively low grade, and that the greater part of the value of the deposits is the gold. In the Moran Dome area the known tin-bearing deposits are in the valley floor and bench gravels along upper Tozimoran Creek. Much of the alluvium is unfrozen, but the deeper portions of the bench gravels and the gravels some distance from the streams are in part frozen. Tin-bearing samples have been obtained from prospect pits and drill holes at a number of sites on Tozimoran Creek between its head and the confluence with Slate Creek. Gold recovered from some of these samples has a fineness of 835. The presence of cassiterite and gold on Ash Creek has been confirmed by sampling. Cassiterite and gold reportedly occur on upper Melozimoran Creek, and several other stream valleys in this area may be tin bearing. In the Mason Creek area cassiterite has been reported in the valley floor and bench alluvial deposits on Mason Creek, but its presence could not be confirmed in the brief field examinations of creek and dump-pile gravel that were made. The limited number of pits and cuts available precluded a valid sampling without additional drilling, pitting, or trenching. In the Ruby-Long area the valleys of Midnight, Birch, and Big Creeks are known to have appreciable concentrations of cassiterite in the gold-bearing placer deposits. The alluvial deposits in the valleys of Ruby, Glacier, Flint, Trail, Long, Fifth of July, Short, Flat, Greenstone, and Monument Creeks contain some cassiterite, but sufficient information could not be obtained to make an evaluation of these occurrences. Cassiterite concentrates, reportedly ranging from 52 to 70.24 percent tin, have been recovered in connection with gold mining operations on Midnight, Birch, and Big Creeks.

Laboratory Enrichment of Radioactive Assemblages and Estimation of Thorium and Uranium Radioactivity in Fractions Separated from Placer Sands in Southeast Bangladesh

DOE Office of Scientific and Technical Information (OSTI.GOV)

Sasaki, Takayuki, E-mail: sasaki@nucleng.kyoto-u.ac.jp; Rajib, Mohammad; Akiyoshi, Masafumi

2015-06-15

The present study reports the likely first attempt of separating radioactive minerals for estimation of activity concentration in the beach placer sands of Bangladesh. Several sand samples from heavy mineral deposits located at the south-eastern coastal belt of Bangladesh were processed to physically upgrade their radioactivity concentrations using plant and laboratory equipment. Following some modified flow procedure, individual fractions were separated and investigated using gamma-ray spectrometry and powder-XRD analysis. The radioactivity measurements indicated contributions of the thorium and uranium radioactive series and of {sup 40}K. The maximum values of {sup 232}Th and {sup 238}U, estimated from the radioactivity of {supmore » 208}Tl and {sup 234}Th in secular equilibrium, were found to be 152,000 and 63,300 Bq/kg, respectively. The fraction of the moderately conductive part in electric separation contained thorium predominantly, while that of the non-conductive part was found to be uranium rich. The present arrangement of the pilot plant cascade and the fine tuning of setting parameters were found to be effective and economic separation process of the radioactive minerals from placer sands in Bangladesh. Probable radiological impacts and extraction potentiality of such radioactive materials are also discussed.« less

Actinides and Life's Origins.

PubMed

Adam, Zachary

2007-12-01

There are growing indications that life began in a radioactive beach environment. A geologic framework for the origin or support of life in a Hadean heavy mineral placer beach has been developed, based on the unique chemical properties of the lower-electronic actinides, which act as nuclear fissile and fertile fuels, radiolytic energy sources, oligomer catalysts, and coordinating ions (along with mineralogically associated lanthanides) for prototypical prebiotic homonuclear and dinuclear metalloenzymes. A four-factor nuclear reactor model was constructed to estimate how much uranium would have been required to initiate a sustainable fission reaction within a placer beach sand 4.3 billion years ago. It was calculated that about 1-8 weight percent of the sand would have to have been uraninite, depending on the weight percent, uranium enrichment, and quantity of neutron poisons present within the remaining placer minerals. Radiolysis experiments were conducted with various solvents with the use of uraniumand thorium-rich minerals (metatorbernite and monazite, respectively) as proxies for radioactive beach sand in contact with different carbon, hydrogen, oxygen, and nitrogen reactants. Radiation bombardment ranged in duration of exposure from 3 weeks to 6 months. Low levels of acetonitrile (estimated to be on the order of parts per billion in concentration) were conclusively identified in 2 setups and tentatively indicated in a 3(rd) by gas chromatography/mass spectrometry. These low levels have been interpreted within the context of a Hadean placer beach prebiotic framework to demonstrate the promise of investigating natural nuclear reactors as power production sites that might have assisted the origins of life on young rocky planets with a sufficiently differentiated crust/mantle structure. Future investigations are recommended to better quantify the complex relationships between energy release, radioactive grain size, fissionability, reactant phase, phosphorus release, and possible abiotic production of sugars, amino acids, activated phosphorus, prototypical organometallic enzymes, and oligomer catalysts at a single putative beach site.

Actinides and Life's Origins

NASA Astrophysics Data System (ADS)

Adam, Zachary

2007-12-01

There are growing indications that life began in a radioactive beach environment. A geologic framework for the origin or support of life in a Hadean heavy mineral placer beach has been developed, based on the unique chemical properties of the lower-electronic actinides, which act as nuclear fissile and fertile fuels, radiolytic energy sources, oligomer catalysts, and coordinating ions (along with mineralogically associated lanthanides) for prototypical prebiotic homonuclear and dinuclear metalloenzymes. A four-factor nuclear reactor model was constructed to estimate how much uranium would have been required to initiate a sustainable fission reaction within a placer beach sand 4.3 billion years ago. It was calculated that about 1-8 weight percent of the sand would have to have been uraninite, depending on the weight percent, uranium enrichment, and quantity of neutron poisons present within the remaining placer minerals. Radiolysis experiments were conducted with various solvents with the use of uranium- and thorium-rich minerals (metatorbernite and monazite, respectively) as proxies for radioactive beach sand in contact with different carbon, hydrogen, oxygen, and nitrogen reactants. Radiation bombardment ranged in duration of exposure from 3 weeks to 6 months. Low levels of acetonitrile (estimated to be on the order of parts per billion in concentration) were conclusively identified in 2 setups and tentatively indicated in a 3rd by gas chromatography/mass spectrometry. These low levels have been interpreted within the context of a Hadean placer beach prebiotic framework to demonstrate the promise of investigating natural nuclear reactors as power production sites that might have assisted the origins of life on young rocky planets with a sufficiently differentiated crust/mantle structure. Future investigations are recommended to better quantify the complex relationships between energy release, radioactive grain size, fissionability, reactant phase, phosphorus release, and possible abiotic production of sugars, amino acids, activated phosphorus, prototypical organometallic enzymes, and oligomer catalysts at a single putative beach site.

Transport-related mylonitic ductile deformation and shape change of alluvial gold, southern New Zealand

NASA Astrophysics Data System (ADS)

Kerr, Gemma; Falconer, Donna; Reith, Frank; Craw, Dave

2017-11-01

Gold is a malleable metal, and detrital gold particles deform via internal distortion. The shapes of gold particles are commonly used to estimate transport distances from sources, but the mechanisms of internal gold deformation leading to shape changes are poorly understood because of subsequent recrystallisation of the gold in situ in placer deposits, which creates a rim zone around the particles, with undeformed > 10 μm grains. This paper describes samples from southern New Zealand in which grain size reduction (to submicrometer scale) and mylonitic textures have resulted from internal ductile deformation. These textures have been preserved without subsequent recrystallisation after deposition in late Pleistocene-Holocene alluvial fan placers. These mylonitic textures were imposed by transport-related deformation on recrystallised rims that were derived from previous stages of fluvial transportation and deposition. This latest stage of fluvial transport and deformation has produced numerous elongated gold smears that are typically 100 μm long and 10-20 μm wide. These smears are the principal agents for transport-induced changes in particle shape in the studied placers. Focused ion beam (FIB) sectioning through these deformed zones combined with scanning electron microscopic (SEM) imaging show that the interior of the gold particles has undergone grain size reduction (to 500 nm) and extensive folding with development of a ductile deformation fabric that resembles textures typical of mylonites in silicate rocks. Relict pods of the pre-existing recrystallised rim zone are floating in this ductile deformation zone and these pods are irregular in shape and discontinuous in three dimensions. Micrometer scale biologically-mediated deposition from groundwater of overgrowth gold on particle surfaces occurs at all stages of placer formation, and some of this overgrowth gold has been incorporated into deformation zones. These examples provide a rare view into the nature of the physical processes that accommodate gold particle shape change during sedimentary transport.

Reconnaissance for radioactive deposits in eastern Alaska, 1952

USGS Publications Warehouse

Nelson, Arthur Edward; West, Walter S.; Matzko, John J.

1954-01-01

Reconnaissance for radioactive deposits was conducted in selected areas of eastern Alaska during 1952. Examination of copper, silver, and molybdenum occurrences and of a reported nickel prospect in the Slana-Nabesna and Chisana districts in the eastern Alaska Range revealed a maximum radioactivity of about 0.003 percent equivalent uranium. No appreciable radioactivity anomolies were indicated by aerial and foot traverses in the area. Reconnaissance for possible lode concentrations of uranium minerals in the vicinity of reported fluoride occurrences in the Hope Creek and Miller House-Circle Hot Springs areas of the Circle quadrangle and in the Fortymile district found a maximum of 0.055 percent equivalent uranium in a float fragment of ferruginous breccia in the Hope Creek area; analysis of samples obtained in the vicinity of the other fluoride occurrences showed a maximum of only 0.005 percent equivalent uranium. No uraniferous loads were discovered in the Koyukuk-Chandalar region, nor was the source of the monazite, previously reported in the placer concentrates from the Chandalar mining district, located. The source of the uranotheorianite in the placers at Gold Bench on the South Fork of the Koyukuk River was not found during a brief reconaissance, but a placer concentrate was obtained that contains 0.18 percent equivalent uranium. This concentrate is about ten times more radioactive than concentrates previously available from the area.

Reconnaissance investigation of the placer gold deposits in the Zarkashan Area of Interest, Ghazni Province, Afghanistan

USGS Publications Warehouse

Malpeli, Katherine C.; Chirico, Peter G.; McLoughlin, Isabel H.

2013-01-01

This study is a reconnaissance investigation of the placer gold deposits in the Zarkashan Area of Interest (AOI) in Ghazni Province, Afghanistan. Detailed investigations of the Zarkashan gold deposits were conducted by Soviet and Afghan geologists in the 1960s and 1970s, prior to the development of satellite-based remote-sensing platforms and new methods of geomorphic mapping. The purpose of this study was to integrate new mapping techniques with previously collected concentration and borehole sampling data and geomorphologic interpretations to reassess the placer gold deposits in the Zarkashan AOI. A methodology combining the collection and analysis of historical sampling data, digital database development, hydrologic analysis, and geomorphic modeling was used. The analysis led to the reinterpretation of four gold-bearing seams along the Zarkashan River, and the calculation of an estimated gold reserve of approximately 3,000 kilograms (kg). This estimate is approximately 1,500 kg greater than the Soviet estimate. The result differs in large part due to the reinterpretation of the seams based on a much lower cutoff grade of 100 mg/m3. Because cutoff grade is dependent in part on the price of gold, the sevenfold increase in the price of gold since the undertaking of the Soviet investigation warranted our re-evaluation of their 500 mg/m3 cutoff grade.

Tin

USGS Publications Warehouse

Kamilli, Robert J.; Kimball, Bryn E.; Carlin, James F.; Schulz, Klaus J.; DeYoung,, John H.; Seal, Robert R.; Bradley, Dwight C.

2017-12-19

Tin (Sn) is one of the first metals to be used by humans. Almost without exception, tin is used as an alloy. Because of its hardening effect on copper, tin was used in bronze implements as early as 3500 B.C. The major uses of tin today are for cans and containers, construction materials, transportation materials, and solder. The predominant ore mineral of tin, by far, is cassiterite (SnO2).In 2015, the world’s total estimated mine production of tin was 289,000 metric tons of contained tin. Total world reserves at the end of 2016 were estimated to be 4,700,000 metric tons. China held about 24 percent of the world’s tin reserves and accounted for 38 percent of the world’s 2015 production of tin.The proportion of scrap used in tin production is between 10 and 25 percent. Unlike many metals, tin recycling is relatively efficient, and the fraction of tin in discarded products that get recycled is greater than 50 percent.Only about 20 percent of the world’s identified tin resources occur as primary hydrothermal hard-rock veins, or lodes. These lodes contain predominantly high-temperature minerals and almost invariably occur in close association with silicic, peraluminous granites. About 80 percent of the world’s identified tin resources occur as unconsolidated secondary or placer deposits in riverbeds and valleys or on the sea floor. The largest concentration of both onshore and offshore placers is in the extensive tin belt of Southeast Asia, which stretches from China in the north, through Thailand, Burma (also referred to as Myanmar), and Malaysia, to the islands of Indonesia in the south. Furthermore, tin placers are almost always found closely allied to the granites from which they originate. Other countries with significant tin resources are Australia, Bolivia, and Brazil.Most hydrothermal tin deposits belong to what can be thought of as a superclass of porphyry-greisen deposits. The hydrothermal tin deposits are all characterized by a close spatial, temporal, and genetic association with highly differentiated, peraluminous porphyritic granite intrusions. The intrusions form pegmatites; disseminated ore; parallel or subparallel, greisen-bordered sheeted veins that either cross-cut the intrusion or are peripheral to it; skarns; and (or) limestone replacements that contain different amounts of cassiterite, molybdenite, and wolframite.The tectonic settings of tin-bearing granites are relatively well understood and of limited variety. Tin and tungsten deposits and their associated igneous rocks are found mainly in continental settings.Historically, prospecting for tin has been carried out by the time-honored methods of panning, drilling, trenching, and assaying. Geophysical and geochemical surveys have been employed to cover large areas more rapidly, isolating areas of possible tin deposits so that drilling can be more effective and less costly. Elemental concentrations and relationships of the lithophile elements, especially barium, lithium, niobium, potassium, rubidium, and zirconium, are the most reliable chemical indicators of ore-forming processes and tin-bearing potential.The average human diet includes an intake of about 10 milligrams per day of tin. Ingestion of tin in significantly greater amounts than 10 milligrams per day may lead to a stomach ache, anemia, and liver and kidney problems. Exposure to some organo-tin compounds can interfere with brain and nervous system function and, in severe cases, can cause death. Extended inhalation of tin oxide—an issue mainly for those people who work in the tin industry—results in a higher potential to develop stannosis, which is a mild disease of the lungs caused by the inhalation of tin-bearing dust. Inorganic tin is poorly absorbed by the body, and no evidence exists for the carcinogenicity of metallic tin and tin compounds in humans.Most placer tin deposits are mined by open pit and (or) dredging methods. Mining of alluvial placers in modern streambeds and riverbeds is likely to increase the amount of sediment delivered downstream. This, combined with potential diversion of rivers and streams, may negatively affect downstream ecosystems. Many of the placer deposits located in Burma, Indonesia, Malaysia, and Thailand are located offshore. Most offshore placer tin deposits are mined by dredging methods, which have the potential to negatively affect benthic, midwater, and pelagic ecosystems.In a congressionally mandated U.S. Department of Defense study of strategic minerals published in 2013, tin has the greatest shortfall amount (insufficient supply to meet demand) at \\$416 million; this amount is more than twice that of antimony ($182 million), which is the strategic mineral with the next largest shortfall amount (U.S. Department of Defense, 2013). The United States imported 75 percent of its tin supply in 2015. During the period 2012–15, these imports were from, in descending order of amount imported, Peru, Indonesia, Malaysia, and Bolivia.A promising advancement concerning research into the origin of tin deposits is the recent development of a reliable method of analyzing tin isotopes in cassiterite. Although the mechanism of transport and deposition of tin is fairly well understood, the means by which tin is incorporated into the parent magma at the points of magma generation and ascent needs further investigation.Tin metallogenic provinces worldwide are well known. Consequently, any undiscovered tin deposits will likely be spatially close to known deposits or extensions of the same.

Gold deposit styles and placer gold characterisation in northern and east-central Madagascar

USGS Publications Warehouse

Pitfield, Peter E. J; Styles, Michael T.; Taylor, Cliff D.; Key, Roger M.; Bauer,; Ralison, A

2009-01-01

Microchemical characterisation of bedrock and placer gold grains from six gold districts within the Archaean domains and intervening Neoproterozoic Anaboriana-Manampotsy belt of northern and east-central Madagascar show few opaque inclusions (e.g pyrrhotite, Bi tellurides) but wide range of Ag contents (40wt%). Some districts exhibit multiple source populations of grains. The ‘greenstone belt’ terranes have an orogenic gold signature locally with an intrusion-related to epithermal overprint. Proterozoic metasediments with felsic to ultramafic bodies yield dominantly intrusion-related gold. A high proportion of secondary gold (<0.5wt% Ag) is related to recycling of paleoplacers and erosion of post-Gondwana planation surfaces and indicates that some mesothermal gold systems were already partially to wholly removed by erosion by the PermoTriassic.

Mineral resources of the Atlantic Exclusive Economic Zone

USGS Publications Warehouse

Dillon, William P.

1984-01-01

Potential mineral resources of the Atlantic Exclusive Economic Zone (including the Gulf of Mexico and US Caribbean areas) include petroleum, sand and gravel, phosphorite, placer deposits of heavy mineral sands, ferromanganese nodules, and fresh water. Although major efforts have been made to search for petroleum, the oil and gas resources of the region are well known only in the western Gulf Shelf and more exploration is under way. Heavy-mineral placer deposits, which may be sources of titanium, gold, rare earths, etc. , have been sampled, but the extent and, therefore, economic value of the deposits have not been identified. Sand and gravel, phosphorite, and ferromanganese nodules all are represented by fairly well established deposits, and only modified market conditions would be necessary to cause detailed exploration and mining.

Gold placer and Quaternary stratigraphy of the Jabal Mokhyat area, southern Najd Province, Kingdom of Saudi Arabia

USGS Publications Warehouse

Schmidt, D.L.; Puffett, W.P.; Campbell, W.L.; Al-Koulak, Z. H.

1981-01-01

An ancient gold placer at Jabal Mokhyat (lat 20?12.2'N., long 43?28'E.), about 90 km east of Qalat Bishah in the southern Najd Province, Kingdom of Saudi Arabia, was studied in 1973. Seven hundred and twenty-eight samples in 25 measured sections were collected along trenches and pits 2.5 m in depth and 2,600 m in total length. Alluvium was thicker than the excavation depth along about 50 percent of the trench length. The average gold content was 4.4 mg per m3, and the highest grade trench contained 40 mg gold per m 3. Because fine particulate gold is rare in the alluvium, a few large particles, 1 to 5 mm in diameter, greatly affected the sampling results. The ancient placer diggings are in small headwater wadis distributed over a 30-km 2 area, and the total dug area is about 1.2 km2. The placer produced an estimated 50 kg of gold and was worked about 2,600 + 250 years ago. The potential for a present-day placer operation is small. The gold is sparsely distributed in locally derived, flood-deposited, immature gravels throughout a stratigraphic section that consists of 1) calichified, saprolitic bedrock of Precambrian age; 2) basal, intensely calichified, saprolitic gravel (0-3 m thick) of Pleistocene age; 3) disconformable, slightly consolidated gravel and sand (0-1 m thick) of late Pleistocene age containing sparse, disseminated caliche; 4) firm loessic silt (0-1 m thick) of early Holocene age; and 5) loose sand and gravel (0.3-1 m thick) of late Holocene age. The loessic silt accumulated during the Holocene pluvial. The top of the loessic silt unit is dated at about 6,000 years B.P. by using charcoal from hearths of ancient man. Following the Holocene pluvial, the climate became arid, and extreme desiccation resulted in abundant eolian sand that progressively diluted the late Holocene gravels. The remnants of the pre-Holocene stratigraphy suggest similar climatic cycles during the Pleistocene. Abundant, sparsely mineralized, gold-bearing quartz veins (0-1 m wide) were the source of the placer gold. These late Proterozoic veins have hydrothermally altered wall-rock zones (1-5 m wide). The veins are dispersed over an area of 50 km 2. Though many veins were prospected in ancient times and some were slightly worked, only the Mokhyat ancient mine, located on a quartz-vein zone 30 m wide by 200 m long, was extensively worked. The quartz contains chalcopyrite, galena, sphalerite, tetrahedrite, an unidentified bismuth mineral, and small amounts of dispersed gold. The fissure quartz veins lie at the complexly splayed, terminal end of a small northwest-trending Najd fault that elsewhere along strike has ii km of left-lateral displacement. Most large veins are in north-trending vertical fractures where the stresses were distributed along an older, north-trending structural grain in andesitic greenstone terrane. Subhorizontal fracture sets contain conspicuous, well-developed gold-bearing quartz veins and associated alteration zones. These attest to the shallowness and youthfulness of mineralization during latest Precambrian time. Late Precambrian granitic plutons (625-600 m.y. old) had been deeply eroded before the gold minerals were emplaced; hence, the gold is not related to granitic plutonism. Abundant, widely distributed diabasic dikes associated with the Najd faulting event of latest Precambrian age were probably the heat source for the hydrothermal convection system and possibly the source of the gold.

Native gold from the Inagli Pt-Au placer deposit (the Aldan Shield, Russia): geochemical characteristics and implications for possible bedrock sources

NASA Astrophysics Data System (ADS)

Svetlitskaya, Tatyana V.; Nevolko, Peter A.; Kolpakov, Vladislav V.; Tolstykh, Nadezhda D.

2018-03-01

The Inagli alluvial Pt-Au placer deposit in the Republic of Sakha (Yakutia), Russia, is linked to the Inagli massif, one of the several Uralian-Alaskan-type alkaline-ultrabasic complexes in the Aldan Shield. Gold from the placer is heterogeneous in composition and is represented by three types. Type 1 gold is the most abundant and is characterized by simple Au-Ag alloys with 4-34 wt% Ag, low Cu (up to 0.08 wt%) and negligible Hg, Pt, and Pd contents, and silver-tellurium sulfosalts (Ag-Cu-Te-S-As compounds) in the inclusion suite. Silicate inclusions are biotite, K-feldspar, Fe-Mg amphibole, chlorite, plagioclase, Fe-Mg pyroxene, zircon, and titanite. Distinctive features of this gold type are most similar to those derived from low-sulfidation systems linked to iron oxide copper-gold or iron skarn types of mineralization. The bedrock source of type 1 gold could be related with monzonite to syenite intrusions surrounding the Inagli massif. Distinctive features of type 2 gold include a wide discontinuous range of Ag content (1-18 wt%), elevated Cu (up to 0.5 wt%), and occasional Pd (up to 0.3 wt%) levels, non-detectable Pt and Hg contents, and rare inclusions of simple sulfides (digenite, pyrrhotite) and Na amphibole. Type 3 gold is distinguished by a narrow range in Ag content (5-8 wt%), elevated Hg (0.5-1 wt%) contents, negligible Cu, Pt and Pd levels, and Au-Pb compounds + K-feldspar inclusions. Microchemical characteristics of type 2 and type 3 gold are interpreted as suggestive of an alkaline-magmatic-related fluid. Based on the grain morphology and microchemical signatures, potential bedrock sources for both gold types could be related to the numerous alkaline veins and potassic alteration zones within the dunite core. A comparison of the Inagli and the Kondyor placer gold allows to generate distinctive generic signatures for gold from Uralian-Alaskan-type alkaline-ultrabasic complexes in the Aldan Shield.

Publications - PIR 2016-2 | Alaska Division of Geological & Geophysical

Science.gov Websites

; Core Drilling; Cretaceous; Geologic Materials Center; Gold; Hayes Glacier Belt; Holocene; Intrusion ; Molybdenum; Placer Gold; Porphyry; Tellurium Top of Page Department of Natural Resources, Division of

25 CFR 214.8 - Acreage limitation.

Code of Federal Regulations, 2010 CFR

2010-04-01

... excess of the following areas: (a) For deposits of the nature of lodes, or veins containing ores of gold, silver, copper, or other useful metals, 640 acres. (b) For beds of placer gold, gypsum, asphaltum...

25 CFR 214.8 - Acreage limitation.

Code of Federal Regulations, 2014 CFR

2014-04-01

... excess of the following areas: (a) For deposits of the nature of lodes, or veins containing ores of gold, silver, copper, or other useful metals, 640 acres. (b) For beds of placer gold, gypsum, asphaltum...

25 CFR 214.8 - Acreage limitation.

Code of Federal Regulations, 2012 CFR

2012-04-01

... excess of the following areas: (a) For deposits of the nature of lodes, or veins containing ores of gold, silver, copper, or other useful metals, 640 acres. (b) For beds of placer gold, gypsum, asphaltum...

25 CFR 214.8 - Acreage limitation.

Code of Federal Regulations, 2013 CFR

2013-04-01

... excess of the following areas: (a) For deposits of the nature of lodes, or veins containing ores of gold, silver, copper, or other useful metals, 640 acres. (b) For beds of placer gold, gypsum, asphaltum...

25 CFR 214.8 - Acreage limitation.

Code of Federal Regulations, 2011 CFR

2011-04-01

... excess of the following areas: (a) For deposits of the nature of lodes, or veins containing ores of gold, silver, copper, or other useful metals, 640 acres. (b) For beds of placer gold, gypsum, asphaltum...

75 FR 52303 - Sierra County Resource Advisory Committee

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-25

... Advisory Committee Act. The purpose of the meeting is to discuss projects submitted for funding and the expenditure of Title II funds benefiting National Forest System lands in Nevada and Placer Counties. DATES...

40 CFR 440.148 - Best Management Practices (BMP).

Code of Federal Regulations, 2013 CFR

2013-07-01

... GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine... control: The amount of new water allowed to enter the plant site for use in ore processing shall be...

40 CFR 440.148 - Best Management Practices (BMP).

Code of Federal Regulations, 2012 CFR

2012-07-01

... GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine... control: The amount of new water allowed to enter the plant site for use in ore processing shall be...

40 CFR 440.148 - Best Management Practices (BMP).

Code of Federal Regulations, 2014 CFR

2014-07-01

... GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine... control: The amount of new water allowed to enter the plant site for use in ore processing shall be...

Metallogenic belt and mineral deposit maps of northeast Asia

USGS Publications Warehouse

Obolenskiy, Alexander A.; Rodionov, Sergey M.; Dejidmaa, Gunchin; Gerel, Ochir; Hwang, Duk-Hwan; Miller, Robert J.; Nokleberg, Warren J.; Ogasawara, Masatsugu; Smelov, Alexander P.; Yan, Hongquan; Seminskiy, Zhan V.

2013-01-01

This report contains explanatory material and summary tables for lode mineral deposits and placer districts (Map A, sheet 1) and metallogenic belts of Northeast Asia (Maps B, C, and D on sheets 2, 3, and 4, respectively). The map region includes eastern Siberia, southeastern Russia, Mongolia, northeast China, and Japan. A large group of geologists—members of the joint international project, Major Mineral Deposits, Metallogenesis, and Tectonics of Northeast Asia—prepared the maps, tables, and introductory text. This is a cooperative project with the Russian Academy of Sciences, Mongolian Academy of Sciences, Mongolian National University, Ulaanbaatar, Mongolian Technical University, Mineral Resources Authority of Mongolia, Geological Research Institute, Jilin University, China Geological Survey, Korea Institute of Geoscience and Mineral Resources, Geological Survey of Japan, and U.S. Geological Survey. This report is one of a series of reports on the mineral resources, geodynamics, and metallogenesis of Northeast Asia. Companion studies include (1) a detailed geodynamics map of Northeast Asia (Parfenov and others, 2003); (2) a compilation of major mineral deposit models (Rodionov and Nokleberg, 2000; Rodionov and others, 2000); (3) a series of metallogenic belt maps (Obolenskiy and others, 2004); (4) location map of lode mineral deposits and placer districts of Northeast Asia (Ariunbileg and others, 2003b); (5) descriptions of metallogenic belts (Rodionov and others, 2004); (6) a database on significant metalliferous and selected nonmetalliferous lode deposits and selected placer districts (Ariunbileg and others, 2003a); and (7) a series of summary project publications (Ariunbileg and 74 others, 2003b).

1. West portal of Tunnel 25, contextual view to northeast ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. West portal of Tunnel 25, contextual view to northeast from Tunnel 24 (HAER CA-200), 135mm lens. - Central Pacific Transcontinental Railroad, Tunnel No. 25, Milepost 133.09, Applegate, Placer County, CA

75 FR 70200 - Nevada and Placer Counties Resource Advisory Committee

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-17

... the Secure Rural Schools and Community Self- Determination Act (Pub. L. 110-343) and in compliance... for funding and the expenditure of Title II funds benefiting National Forest System lands in Nevada...

Publications - IC 47 | Alaska Division of Geological & Geophysical Surveys

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Surveys Comments: Your help is crucial in the compilation of future Alaska Minerals Reports. The quality ; Placer; Platinum; Precious Metals; Red Dog; Sand and Gravel; Silver; Skarn; Soil Chemistry; Stibnite

ARC-2010-ACD10-0052-050

NASA Image and Video Library

2010-03-20

For Inspiration and Recognition of Science and Technology; FIRST Robotics Competition 2010 Silicon Valley Regional held at San Jose State University, San Jose, California Renevatio, Granite Bay H.S. & South Placer Area H.S.s,CA Team 295

4. East portal of Tunnel 25, view to southwest from ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. East portal of Tunnel 25, view to southwest from west end of Tunnel 26 (HAER CA-202), 135mm lens. - Central Pacific Transcontinental Railroad, Tunnel No. 25, Milepost 133.09, Applegate, Placer County, CA

6. Detail, vertical guides adjacent to east portal of Tunnel ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. Detail, vertical guides adjacent to east portal of Tunnel 28, view to southwest, 135mm lens with electronic flash fill. - Central Pacific Transcontinental Railroad, Tunnel No. 28, Milepost 134.75, Applegate, Placer County, CA

40 CFR 440.148 - Best Management Practices (BMP).

Code of Federal Regulations, 2011 CFR

2011-07-01

... GUIDELINES AND STANDARDS ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine Subcategory § 440.148...: The amount of new water allowed to enter the plant site for use in ore processing shall be limited to...

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quality and completeness of the information in these annual reports is dependent on input from all members ; Placer; Platinum; Pogo; Precious Metals; Red Dog; Sand and Gravel; Silver; Skarn; Soil Chemistry

Morphological Characterization Of Titania Slag Obtained From Red Sediment Placer Ilmenite Using Microwave Energy

NASA Astrophysics Data System (ADS)

Srikant, S. S.; Mukherjee, P. S.; Bhima Rao, R.

2015-04-01

This paper deals with the main objective to observe the effect of microwave heat treatment for the production of Titania rich slag and pig iron from placer ilmenite. The experiments carried out in the present investigation on the oxidized ilmenite sample for microwave heat treatment in microwave sintering furnace reveals that a product can be obtained containing Titania rich slag and metalized iron. The in-depth characterisation of these products using SEM-EDAX shows that around 75-85 % of titanium dioxide is formed in terms of titania rich slag by using microwave sintering furnace after reduction of oxidized ilmenite with proper stoichiometric graphitic carbon and silicon carbide (SiC) susceptor. The titania rich slag is considered to be better input material for production of pigment grade titanium dioxide. On the other hand, the pig iron obtained as by product from titania rich slag is also important for automobile and steel industries application.

Placer lag deposits in submarine channels in the Gulf of Alaska

DOE Office of Scientific and Technical Information (OSTI.GOV)

Dobson, M.R.; Huggett, Q.

1990-06-01

GLORIA surveys in the Gulf of Alaska during 1989 have revealed details of sediment transport systems that cross the Slope, Rise, and adjacent abyssal plain. Two systems dominate: channel-levee complexes that promote the construction of major fans, and large single channels with subdued overbank activities which terminate as extended sediment lobes that may coalesce to give sand plains. Both channel types originate from Upper Slope gulley zones developed on rapidly dumped shelf edge fans associated with major tidewater glaciers that during periods of climatic deterioration and lower sea levels extended across the narrow shelf to the top of the Slope.more » Thus, the sediment source for these channel systems consists of unsorted rapidly abandoned glacial debris. The nature of initial emplacement of unsorted sediments is significant because the Alaskan provenance area is rich in heavy or placer type minerals; particularly those with economic value such as gold and platinum. The reworking of these sediments along submarine channels that morphologically have strong similarities with subaerial systems makes placer prospecting a viable proposition. Surveys using GLORIA, 10 KHz, and 3.5 KHz profilers together with a 140 in.{sup 3} airgun array have allowed the identification of prospecting sites and provided the control for the development of predictive models for those processes that ensure heavy mineral concentration in the transport regimes identified for this margin. Importantly, because this margin is an active transform type, individual fans, sourcing as they do from restricted sites along this coastline, are short-lived such that even abandoned fans offer prospects for the surveyor.« less

Mercury Contamination from Historic Gold Mining in California

USGS Publications Warehouse

Alpers, Charles N.; Hunerlach, Michael P.

2000-01-01

Mercury contamination from historic gold mines represents a potential risk to human health and the environment. This fact sheet provides background information on the use of mercury in historic gold mining and processing operations in California, and describes a new USGS project that addresses the potential risks associated with mercury from these sources, with emphasis on historic hydraulic mining areas. Miners used mercury (quicksilver) to recover gold throughout the western United States at both placer (alluvial) and hardrock (lode) mines. The vast majority of mercury lost to the environment in California was from placer-goldmines, which used hydraulic, drift, and dredging methods. At hydraulic mines, placer ores were broken down with monitors (or water cannons, fig. 1) and the resulting slurry was directed throughsluices and drainage tunnels, where goldparticles combined with liquid mercury to form gold?mercury amalgam. Loss ofmercury in this process was 10 to 30 percent per season (Bowie, 1905), resulting in highly contaminated sediments at mine sites (fig. 2). Elevated mercury concentrations in present-day mine waters and sediments indicate thathundreds to thousands of pounds of mercury remain at each of the many sites affected by hydraulic mining. High mercury levels in fish, amphibians, and invertebrates downstream of the hydraulic mines are a consequence of historic mercury use. On the basis of USGS studies and other recent work, a better understanding is emerging of mercury distribution, ongoing transport, transformation processes, and the extent of biological uptake in areas affected by historic gold mining. This information will be useful to agencies responsible for prudent land and resource management and for protecting public health.

Major, trace and REE geochemistry of recent sediments from lower Catumbela River (Angola)

NASA Astrophysics Data System (ADS)

Vinha, Manuela; Silva, M. G.; Cabral Pinto, Marina M. S.; Carvalho, Paula Cristina S.

2016-03-01

The mineralogy, texture, major, trace and rare earth elements, from recent sediment samples collected in the lower Catumbela River, were analysed in this study to characterize and discuss the factors controlling its geochemistry and provide data that can be used as tracers of Catumbela River inputs to the Angolan continental shelf. The sediments are mainly sands and silty-sands, but sandy-silt also occurs and the mineralogy is composed of quartz, feldspar, phyllosilicates, magnetite, ilmenite and also carbonates when the river crosses limestones and marls in the downstream sector. The hydraulic sorting originates magnetite-ilmenite and REE-enriched minerals placers. The mineralogy of the sediments is controlled by the source rocks and the degree of chemical weathering is lower than erosion. The texture is mainly controlled by location. There is enrichment in all the analysed trace elements in the fine grained, clay minerals and Fe-oxy-hydroxides rich sediments, compared to the coarse grained and quartz plus feldspar rich ones. The coarse grained sediments (without the placers) are impoverished in ΣREE when compared with UCC and NASC compositions, while the fine grained sediments have ΣREE contents similar to UCC and NASC. The placers have ΣREE contents up to 959.59 mg/kg. The source composition is the dominant factor controlling the REE geochemistry of the analysed sediments as there is no difference in the (La/Yb)N, (La/Sm)N and (Gd/Yb)N ratios in coarse and fine grained sediments. The sorting of magnetite, ilmenite, zircon, throrite, thorianite, rutile and titanite explain the HREE/LREE enriched patterns of the coarse grained sediments.

Speciation of mercury and mode of transport from placer gold mine tailings

USGS Publications Warehouse

Slowey, A.J.; Rytuba, J.J.; Brown, Gordon E.

2005-01-01

Historic placer gold mining in the Clear Creek tributary to the Sacramento River (Redding, CA) has highly impacted the hydrology and ecology of an important salmonid spawning stream. Restoration of the watershed utilized dredge tailings contaminated with mercury (Hg) introduced during gold mining, posing the possibility of persistent Hg release to the surrounding environment, including the San Francisco Bay Delta. Column experiments have been performed to evaluate the extent of Hg transport under chemical conditions potentially similar to those in river restoration projects utilizing dredge tailings such as at Clear Creek. Physicochemical perturbations, in the form of shifts in column influent ionic strength and the presence of a low molecular weight organic acid, were applied to coarse and fine sand placer tailings containing 109-194 and 69-90 ng of Hg/g, respectively. Significant concentrations of mercury, up to 16 ??g/L, leach from these sediments in dissolved and particle-associated forms. Sequential chemical extractions (SCE) of these tailings indicate that elemental Hg initially introduced during gold mining has been transformed to readily soluble species, such as mercury oxides and chlorides (3-4%), intermediately extractable phases that likely include (in)organic sorption complexes and amalgams (75-87%), and fractions of highly insoluble forms such as mercury sulfides (6-20%; e.g., cinnabar and metacinnabar). Extended X-ray absorption fine structure (EXAFS) spectroscopic analysis of colloids obtained from column effluent identified cinnabar particles as the dominant mobile mercury-bearing phase. The fraction of intermediately extractable Hg phases also likely includes mobile colloids to which Hg is adsorbed. ?? 2005 American Chemical Society.

Gold placers of the historical Fortymile River region, Alaska

USGS Publications Warehouse

Yeend, Warren E.

1996-01-01

The Fortymile River region in east-central Alaska has a long and colorful history as the site of the first major gold discovery in interior Alaska. Placer gold has been mined in the region nearly every year since its original discovery in 1886. Total gold production is approximately 500,000 troy ounces. Although many of the rich deposits have been mined, there still exist areas that contain gold. Areas of mined and unmined gold-bearing creek and terrace gravels are outlined on the accompanying geologic map. The early history of the Fortymile area centered on the small frontier settlement of Fortymile City located at the junction of the Fortymile and Yukon Rivers in Canadian territory. This was the supply and jumping-off point for prospectors who worked their way into Alaska up the Fortymile River and found gold on many of its tributaries. Hand mining, both underground and surface, using sluice boxes and (or) rockers were the earliest methods; later, hydraulicking, dredging, and draglining methods were used. More recently, bulldozers and elevated trammels have been used, as well as very portable floating suction dredges. The rich mining lore of the area is closely associated with events of the nearby world-famous Klondike District. Bedrock and placer geology and mining history of individual gold-rich creeks are herein updated. The Fortymile area, which is part of the Yukon-Tanana Upland, contains quartzite, schist, gneiss, amphibolite, marble, serpentinite, and granite overlain by basalt, sandstone, conglomerate, shale, tuff, and coal; overlying these rocks are several deposits of varying ages consisting of gold-bearing gravel and colluvium. The close spatial association of creeks containing placer gold and the gneiss, schist, amphibolite, and marble unit strongly suggests this metamorphic unit is the gold source. High terrace gravels record a time from the late Tertiary to early Pleistocene when the ancestral Fortymile River and its major tributaries, the North and South Forks, had floodplains roughly 1 to 2 miles (2-3 kilometers) wide and gradients of about 4 feet per mile (0.75 meters per kilometer). Base-level lowering during the post-early Pleistocene caused the rivers to cut into their floodplains and to develop the youthful characteristics they have today such as V-shaped canyons, narrow floodplains, and gradients of at least twice those of the old river. Colluvium marginal to creek deposits in steep-sided valleys is often gold bearing. Much of the unconsolidated gravel within the major drainages of the Fortymile River, South Fork, North Fork, and Mosquito Fork is colluvium.Heavy-mineral-concentrate samples from the gold-producing creeks and high terrace gravels contain varying amounts of magnetite (20 to 80 percent) and ilmenite (10 to 30 percent), and samples from creeks draining areas principally composed of metamorphic rocks contain abundant garnet (10 to 30 percent). Gold fineness ranges from 620 to 927, but it is difficult to attach any geologic significance to the fineness data.Most placer gold in the Fortymile River area has been recovered at, or near, the gravelbedrock contact. The lowermost 3.3 feet (1 meter) of gravel and the uppermost 1.6 feet (0.5 meter) of bedrock may contain as much as 80 to 90 percent of the gold that is ultimately recovered. Gold nuggets are rare and most of the gold recovered is in the form of flattened fragments less than .2 inches (5 millimeters) in greatest dimension. However, large gold nuggets have been found on Wade Creek; examples are ones of 25,33,56, and 70 ounces. Occasionally, large nuggets may still be found in the tailing piles along the creek. The Fortymile River and its tributaries the South Fork, Walker Fork, and Mosquito Fork, all of which at one time were the sites of bucket-line dredge operations, now are almost exclusively mined using floating suction dredges. Unmined gold-bearing gravel is present in the floodplain of the Walker Fork valley below Cherry Creek and in low (about 100 to 130 feet or 30 to 40 meters) terraces along the north side of Walker Fork and east side of Cherry Creek. Considering the locations of where most gold has been found in the South Fork valley both by the older bucket dredges and the modern suction dredges, it seems likely that the tributary drainages of Lost Chicken, Napoleon, Franklin, and Buckskin Creeks have supplied the bulk of the gold to the South Fork valley. A quarter acre (0.10 hectare), 130-foot-thick ( 40 meters) section of the high terrace gravels on the north side of Napoleon Creek was mined for placer gold and yielded values estimated to be $8.50 per cubic yard (or $6.50 per cubic meter) at $350 per troy ounce. The unmined high terrace gravels on the south side of Buckskin Creek contain gold; however, this gravel is only 3 to 6.5 feet (1 to 2 meters) thick. The search for a lode gold source in the Fortymile River region may be in vain, because substantially more gold than has been recovered from the placers can be derived by the gradual erosion of large volumes of source rocks that contain background mean gold amounts. Using Leon's mass balance equation, 5,167 metric tons of gold may exist in the placers of the Fortymile River region, less than 1 percent of the recovered amount of 15.6 tons. The largest gold resource remaining in the Fortymile River region is probably in the high terrace gravels exposed along many of the creeks and rivers. Until there is exploratory drilling or a comprehensive sampling program, the amount of gold in these gravels will remain unknown. Environmental constraints imposed by Federal and State agencies have slowed, but not stopped, placer mining in the Fortymile River area, and a significant gold price rise would result in more mining.

5. East portal of Tunnel 26, view to southwest, 135mm ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. East portal of Tunnel 26, view to southwest, 135mm lens. Tunnel 25 (HAER CA-201) is visible in the distance. - Central Pacific Transcontinental Railroad, Tunnel No. 26, Milepost 133.29, Applegate, Placer County, CA

7. Detail, machinery shed atop east portal of Tunnel 28, ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. Detail, machinery shed atop east portal of Tunnel 28, showing shaft and pulley system, 210mm lens with electronic flash fill. - Central Pacific Transcontinental Railroad, Tunnel No. 28, Milepost 134.75, Applegate, Placer County, CA

Application of gold compositional analyses to mineral exploration in the United States

USGS Publications Warehouse

Antweiler, J.C.; Campbell, W.L.

1977-01-01

Native gold is a mineral composed of Au, Ag and Cu in solid solution and it usually contains one or more trace metals as lattice impurities, as mineral inclusions, in grain boundaries or in surface coatings. Alloy proportions of Au, Ag and Cu, together with certain other elements, can be thought of as constituting a gold "signature". Gold is associated with a great variety of ore deposits and has characteristic signatures for each of several types of ore deposits. Signatures for gold derived from igneous-metamorphic, hypothermal, mesothermal and epithermal deposits reflect conditions of ore formation by their content of Ag, Cu and characteristic associated elements. At higher temperatures of ore formation, gold has low Ag and high Cu content, and Bi and Pb are the most abundant trace elements. But at lower temperatures of ore formation, Ag is high, Cu is low, and Pb is the most abundant trace element. The same trend in gold signatures is observable in gold mining districts, such as Central City, Colorado, where zoning as shown by mineral assemblages indicates ore deposition at progressively lower temperatures as the distance from a central high-temperature zone increases. The signatures of gold may be useful in searching for porphyry Cu deposits. Signatures from Butte (Montana), Mineral Park (Arizona) and Cala Abajo (Puerto Rico), on the basis of limited sampling, are similar and distinctive. They are characterized by a similar assemblage of trace elements and are relatively high in both Ag and Cu. Another application of gold compositional data is in tracing placer gold to its bedrock source. For example, the Ag content of placer gold in the Tarryall district of Colorado differed from that of nearly all of the bedrock sources of gold found by early prospectors. However, one lightly prospected area peripheral to the Tertiary quartz monzonite stock at Montgomery Gulch contains gold with a Ag content similar to that of the placer gold. This area is the most likely source of the gold in the productive placers and may be a potential exploration target. Gold signatures may be useful in prospecting for metals other than gold. Several metals of low crustal abundance - notably Sn, W, Mo and the Pt group metals - are detected in analyses of some gold samples and may indicate economic deposits of these metals. ?? 1977.

Suspended sediment load below open-cast mines for ungauged river basin

NASA Astrophysics Data System (ADS)

Kuksina, L.

2011-12-01

Placer mines are located in river valleys along river benches or river ancient channels. Frequently the existing mining sites are characterized by low contribution of the environmental technologies. Therefore open-pit mining alters stream hydrology and sediment processes and enhances sediment transport. The most serious environmental consequences of the sediment yield increase occur in the rivers populated by salmon fish community because salmon species prefer clean water with low turbidity. For instance, placer mining located in Kamchatka peninsula (Far East of Russia) which is regarded to be the last global gene pool of wild salmon Oncorhynchus threatens rivers ecosystems significantly. Impact assessment is limited by the hydrological observations scarcity. Gauging network is rare and in many cases whole basins up to 200 km length miss any hydrological data. The main purpose of the work is elaboration of methods for sediment yield estimation in rivers under mining impact and implementation of corresponding calculations. Subjects of the study are rivers of the Vivenka river basin where open-cast platinum mine is situated. It's one of the largest platinum mines in Russian Federation and in the world. This mine is the most well-studied in Kamchatka (research covers a period from 2003 to 2011). Empirical - analytical model of suspended sediment yield estimation was elaborated for rivers draining mine's territories. Sediment delivery at the open-cast mine happens due to the following sediment processes: - erosion in the channel diversions; - soil erosion on the exposed hillsides; - effluent from settling ponds; - mine waste water inflow; - accident mine waste water escape into rivers. Sediment washout caused by erosion was estimated by repeated measurements of the channel profiles in 2003, 2006 and 2008. Estimation of horizontal deformation rates was carried out on the basis of erosion dependence on water discharge rates, slopes and composition of sediments. Soil erosion on the exposed hillsides was estimated taking into account precipitation of various intensity and solid material washout during this period. Effluent from settling ponds was calculated on the basis of minimum anthropogenic turbidity. Its value is difference in background turbidity and minimal turbidity caused by effluent and waste water overflow. Mine waste water inflow was estimated due to actual data on water balance of purification system. Accident mine waste water escape into rivers was estimated by duration and material washout during accidents data measured during observation period. Total suspended sediment yield of rivers draining mine's territory is the sum of its components. Total sediment supply from mining site is 24.7 % from the Vivenka sediment yield. Polluted placer-mined rivers contribute about 35.4 % of the whole sediment yield of the Vivenka river. At the same time the catchment area of these rivers is less than 0.2 % from the whole Vivenka catchment area.

40 CFR 440.50 - Applicability; description of the titanium ore subcategory.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) mills beneficiating titanium ores by electrostatic methods, magnetic and physical methods, or flotation methods; and (c) mines engaged in the dredge mining of placer deposits of sands containing rutile... methods in conjunction with electrostatic or magnetic methods). ...

Undiscovered locatable mineral resources in the Bay Resource Management Plan Area, Southwestern Alaska: A probabilistic assessment

USGS Publications Warehouse

Schmidt, J.M.; Light, T.D.; Drew, L.J.; Wilson, Frederic H.; Miller, M.L.; Saltus, R.W.

2007-01-01

The Bay Resource Management Plan (RMP) area in southwestern Alaska, north and northeast of Bristol Bay contains significant potential for undiscovered locatable mineral resources of base and precious metals, in addition to metallic mineral deposits that are already known. A quantitative probabilistic assessment has identified 24 tracts of land that are permissive for 17 mineral deposit model types likely to be explored for within the next 15 years in this region. Commodities we discuss in this report that have potential to occur in the Bay RMP area are Ag, Au, Cr, Cu, Fe, Hg, Mo, Pb, Sn, W, Zn, and platinum-group elements. Geoscience data for the region are sufficient to make quantitative estimates of the number of undiscovered deposits only for porphyry copper, epithermal vein, copper skarn, iron skarn, hot-spring mercury, placer gold, and placer platinum-deposit models. A description of a group of shallow- to intermediate-level intrusion-related gold deposits is combined with grade and tonnage data from 13 deposits of this type to provide a quantitative estimate of undiscovered deposits of this new type. We estimate that significant resources of Ag, Au, Cu, Fe, Hg, Mo, Pb, and Pt occur in the Bay Resource Management Plan area in these deposit types. At the 10th percentile probability level, the Bay RMP area is estimated to contain 10,067 metric tons silver, 1,485 metric tons gold, 12.66 million metric tons copper, 560 million metric tons iron, 8,100 metric tons mercury, 500,000 metric tons molybdenum, 150 metric tons lead, and 17 metric tons of platinum in undiscovered deposits of the eight quantified deposit types. At the 90th percentile probability level, the Bay RMP area is estimated to contain 89 metric tons silver, 14 metric tons gold, 911,215 metric tons copper, 330,000 metric tons iron, 1 metric ton mercury, 8,600 metric tons molybdenum and 1 metric ton platinum in undiscovered deposits of the eight deposit types. Other commodities, which may occur in the Bay RMP area, include Cr, Sn, W, Zn, and other platinum-group elements such as Ir, Os, and Pd. We define 13 permissive tracts for 9 additional deposit model types. These are: Besshi- and Cyprus, and Kuroko-volcanogenic massive sulfides, hot spring gold, low sulfide gold veins, Mississippi-Valley Pb-Zn, tin greisen, zinc skarn and Alaskan-type zoned ultramafic platinum-group element deposits. Resources in undiscovered deposits of these nine types have not been quantified, and would be in addition to those in known deposits and the undiscovered resources listed above. Additional mineral resources also may occur in the Bay RMP area in deposit types, which were not considered here.

Targeted Support

ERIC Educational Resources Information Center

Simon, Gabe

2011-01-01

Heritage Oak Elementary School (Placer County, CA) has continuously achieved a high level of academic success as measured by the California Standards Test. However, after examining student testing data in depth, staff discovered a large achievement gap between the overall school population, socio-economically disadvantaged students, and students…

7 CFR 917.21 - Nomination of Pear Commodity Committee members.

Code of Federal Regulations, 2010 CFR

2010-01-01

... Section 917.21 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE FRESH PEARS... four nominees. (c) Placer-Colfax District one nominee. (d) Lake District four nominees. (e) Mendocino...

3. West portal of Tunnel 26, view to northeast, 135mm ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. West portal of Tunnel 26, view to northeast, 135mm lens. Note use of granite voussoirs and coping on this otherwise all-reinforced concrete structure. - Central Pacific Transcontinental Railroad, Tunnel No. 26, Milepost 133.29, Applegate, Placer County, CA

2. West portal of Tunnel 26, contextual view to northeast ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. West portal of Tunnel 26, contextual view to northeast from track level, 135mm lens. Tunnel 27 (HAER CA-203) is visible in the distance. - Central Pacific Transcontinental Railroad, Tunnel No. 26, Milepost 133.29, Applegate, Placer County, CA

1. West portal of Tunnel 34, contextual view to northeast ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. West portal of Tunnel 34, contextual view to northeast from inside east end of Tunnel 33 (Cape Horn Tunnel), 135mm lens with electronic flash fill. - Central Pacific Transcontinental Railroad, Tunnel No. 34, Milepost 145.4, Colfax, Placer County, CA

7. Detail, east portal of Tunnel 34/Snowshed 33, 135mm lens. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. Detail, east portal of Tunnel 34/Snowshed 33, 135mm lens. Tall signal mast necessary in order to be seen above winter snows. - Central Pacific Transcontinental Railroad, Tunnel No. 41, Milepost 193.3, Donner, Placer County, CA

43 CFR 3863.1-1 - Application for patent.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false Application for patent. 3863.1-1 Section... MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT APPLICATIONS Placer Mining Claim Patent Applications § 3863.1-1 Application for patent. ...

43 CFR 3863.1-1 - Application for patent.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 43 Public Lands: Interior 2 2012-10-01 2012-10-01 false Application for patent. 3863.1-1 Section... MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT APPLICATIONS Placer Mining Claim Patent Applications § 3863.1-1 Application for patent. ...

43 CFR 3863.1-1 - Application for patent.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 43 Public Lands: Interior 2 2014-10-01 2014-10-01 false Application for patent. 3863.1-1 Section... MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT APPLICATIONS Placer Mining Claim Patent Applications § 3863.1-1 Application for patent. ...

43 CFR 3863.1-1 - Application for patent.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 43 Public Lands: Interior 2 2013-10-01 2013-10-01 false Application for patent. 3863.1-1 Section... MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT APPLICATIONS Placer Mining Claim Patent Applications § 3863.1-1 Application for patent. ...

Regional baseline geochemistry and environmental effects of gold placer mining operations on the Fortymile River, eastern Alaska: A section in Geologic studies in Alaska by the U.S. Geological Survey, 1998

USGS Publications Warehouse

Wanty, Richard B.; Wang, Bronwen; Vohden, Jim; Briggs, Paul H.; Meier, Allen L.

2000-01-01

A systematic water-quality study of the Fortymile River and many of its major tributaries in eastern Alaska was conducted in June of 1997 and 1998. Surface-water samples were collected for chemical analyses to establish regional baseline geochemistry values and to evaluate the possible environmental effects of suction-dredge placer gold mining and bulldozer-operated placer gold mining (commonly referred to as “cat mining”). In general, the water quality of the Fortymile River is very good, with low total dissolved solids and only two cases in which the concentration of any element exceeded primary or secondary drinking-water quality standards. In both cases, iron exceeded secondary drinking-water limits. At the time this work was conducted, only a handful of suction dredges were operating on the lower Fortymile River, and cat mining was being conducted along Uhler Creek and Canyon Creek, two major tributaries to the river. Based on the water-quality and turbidity data, the suction dredges have no apparent impact on the Fortymile River system, although possible effects on biota have not been evaluated in this study. In contrast, the cat-mining operations in Canyon Creek appear to have a dramatic impact on water quality and stream-bed morphology, based on the field water-quality and turbidity measurements, on comparisons to adjacent unmined drainages, and on field observations of stream-bed morphology. The cat mining in Uhler Creek appears to have had less impact, perhaps because the main stream channel was not as heavily disrupted by the bulldozers, and the stability of the channel was mostly preserved.

Geology and market-dependent significance of rare earth element resources

NASA Astrophysics Data System (ADS)

Simandl, G. J.

2014-12-01

China started to produce rare earth elements (REEs) in the 1980s, and since the mid-1990s, it has become the dominant producer. Rare earth element export quotas first introduced by the Chinese government in the early 2000s were severely reduced in 2010 and 2011. This led to strong government-created disparity between prices within China and the rest of the world. Industrialized countries identified several REEs as strategic metals. Because of rapid price increases of REE outside of China, we have witnessed a world-scale REE exploration rush. The REE resources are concentrated in carbonatite-related deposits, peralkaline igneous rocks, pegmatites, monazite ± apatite veins, ion adsorption clays, placers, and some deep ocean sediments. REE could also be derived as a by-product of phosphate fertilizer production, U processing, mining of Ti-Zr-bearing placers, and exploitation of Olympic Dam subtype iron oxide copper gold (IOCG) deposits. Currently, REEs are produced mostly from carbonatite-related deposits, but ion adsorption clay deposits are an important source of heavy REE (HREE). Small quantities of REE are derived from placer deposits and one peralkaline intrusion-related deposit. The ideal REE development targets would be located in a politically stable jurisdiction with a pro-mining disposition such as Canada and Australia. REE grade, HREE/light REE (LREE) ratio of the mineralization, tonnage, mineralogy, and permissive metallurgy are some of the key technical factors that could be used to screen potential development projects. As REEs are considered strategic metals from economic, national security, and environmental points of view, technical and economic parameters alone are unlikely to be used in REE project development decision-making. Recycling of REE is in its infancy and unless legislated, in the short term, it is not expected to contribute significantly to the supply of REE.

Publications - SR 56 | Alaska Division of Geological & Geophysical Surveys

Science.gov Websites

Minerals; Iron; Jade; Jurassic; Kanayut Conglomerate; Kayak Shale; Kuskokwim Group; Lead; Limestone; Lode ; Nickel; Nikolai Greenstone; Noatak Sandstone; Nome Group; Nuggets; Orca Group; Ordovician; Ores ; Paleozoic; Palladium; Pennsylvanian; Placer; Platinum; Platinum Group Elements; Plutonic; Plutonic Hosted

Publications - SR 53 | Alaska Division of Geological & Geophysical Surveys

Science.gov Websites

Group; Lead; Limestone; Lode; Marble; Mercury; Mesozoic; Metallurgy; Metamorphic Rocks; Mineral Pluton; Nickel; Nikolai Greenstone; Noatak Sandstone; Nome Group; Nuggets; Orca Group; Ordovician; Ores ; Paleozoic; Palladium; Pennsylvanian; Placer; Platinum; Platinum Group Elements; Plutonic; Plutonic Hosted

Publications - SR 54 | Alaska Division of Geological & Geophysical Surveys

Science.gov Websites

Minerals; Iron; Jade; Jurassic; Kanayut Conglomerate; Kayak Shale; Kuskokwim Group; Lead; Limestone; Lode ; Nickel; Nikolai Greenstone; Noatak Sandstone; Nome Group; Nuggets; Orca Group; Ordovician; Ores ; Paleozoic; Palladium; Pennsylvanian; Placer; Platinum; Platinum Group Elements; Plutonic; Plutonic Hosted

Publications - SR 57 | Alaska Division of Geological & Geophysical Surveys

Science.gov Websites

; Kanayut Conglomerate; Kayak Shale; Kuskokwim Group; Lead; Limestone; Lode; Marble; Massive Sulfides ; Noatak Sandstone; Nome Group; Nuggets; Orca Group; Ordovician; Ores; Paleozoic; Palladium; Pennsylvanian ; Placer; Platinum; Platinum Group Elements; Plutonic; Plutonic Hosted; Plutonic Rocks; Polymetallic Vein

Publications - SR 55 | Alaska Division of Geological & Geophysical Surveys

Science.gov Websites

Minerals; Iron; Jade; Jurassic; Kanayut Conglomerate; Kayak Shale; Kuskokwim Group; Lead; Limestone; Lode ; Nickel; Nikolai Greenstone; Noatak Sandstone; Nome Group; Nuggets; Orca Group; Ordovician; Ores ; Paleozoic; Palladium; Pennsylvanian; Placer; Platinum; Platinum Group Elements; Plutonic; Plutonic Hosted

Body Type and Composition Differences between Placers and Nonplacers in an AIAW Gymnastics Meet

ERIC Educational Resources Information Center

Falls, Harold B.; Humphrey L. Dennis

1978-01-01

It would appear that certain body types may be advantageous for championship performance in womens gymnastics. These body types are those with relative fat approaching that of the male, higher than average mesomorphy, and lower than average endomorphy. (MJB)

3. East portal of Tunnel 39, view to west with ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. East portal of Tunnel 39, view to west with east portal of Tunnel 38 (HAER CA-211) visible in distance, 135mm lens with electronic flash fill. - Central Pacific Transcontinental Railroad, Tunnel No. 39, Milepost 180.95, Cisco, Placer County, CA

40 CFR 440.145-440.147 - [Reserved

Code of Federal Regulations, 2014 CFR

2014-07-01

... 40 Protection of Environment 30 2014-07-01 2014-07-01 false [Reserved] 440.145-440.147 Section 440.145-440.147 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine Subcategory...

40 CFR 440.145-440.147 - [Reserved

Code of Federal Regulations, 2012 CFR

2012-07-01

... 40 Protection of Environment 31 2012-07-01 2012-07-01 false [Reserved] 440.145-440.147 Section 440.145-440.147 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine Subcategory...

40 CFR 440.145-440.147 - [Reserved

Code of Federal Regulations, 2013 CFR

2013-07-01

... 40 Protection of Environment 31 2013-07-01 2013-07-01 false [Reserved] 440.145-440.147 Section 440.145-440.147 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS (CONTINUED) ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine Subcategory...

An open-water electrical geophysical tool for mapping sub-seafloor heavy placer minerals in 3D and migrating hydrocarbon plumes in 4D

USGS Publications Warehouse

Wynn, J.; Williamson, M.; Urquhart, S.; Fleming, J.

2011-01-01

A towed-streamer technology has been developed for mapping placer heavy minerals and dispersed hydrocarbon plumes in the open ocean. The approach uses induced polarization (IP), an electrical measurement that encompasses several different surface-reactive capacitive and electrochemical phenomena, and thus is ideally suited for mapping dispersed or disseminated targets. The application is operated at sea by towing active electrical geophysical streamers behind a ship; a wide area can be covered in three dimensions by folding tow-paths over each other in lawn-mower fashion. This technology has already been proven in laboratory and ocean settings to detect IP-reactive titanium-and rare-earth (REE) minerals such as ilmenite and monazite. By extension, minerals that weather and accumulate/concentrate by a similar mechanism, including gold, platinum, and diamonds, may be rapidly detected and mapped indirectly even when dispersed and covered with thick, inert sediment. IP is also highly reactive to metal structures such as pipelines and cables. ?? 2011 MTS.

Tin resources of Brazil

USGS Publications Warehouse

White, Max Gregg

1974-01-01

Annual tin production in Brazil, most of it from cassiterite placer deposits in Rondonia Territory, amounts to about 4,000 metric tons (4,400 short tons) of concentrate containing 66 percent tin, much of which is consumed by Brazilian industry. Reserves of cassiterite concentrate in the placers of Rondonia district are estimated at about 160,000 (176,000 short tons) containing 66 percent tin. Extensive undiscovered resources of cassiterite possibly exist in southern Rondonia Territory and to the east of the Territory in northern Mato Grosso, southern Amazonas, and southern Para. Numerous occurrences have been reported in these regions and as far to the east as the headwaters of the Tapajos and the Xingo Rivers. Minor deposits or occurrences of cassiterite (or lode deposits about which there is only minimal information available) are located in Para, Amapa, Paraiba, Rio Grande do Norte, Ceara, Bahia, Minas Gerais, Goias, Sao Paulo, and Rio Grande do Sul. All the lode tin deposits are dated or enclosed in rocks that date as Precambrian B (900 to 1,300 m.y.).

A baseline record of trace elements concentration along the beach placer mining areas of Kanyakumari coast, South India.

PubMed

Simon Peter, T; Chandrasekar, N; John Wilson, J S; Selvakumar, S; Krishnakumar, S; Magesh, N S

2017-06-15

Trace element concentration in the beach placer mining areas of Kanyakumari coast, South India was assessed. Sewage and contaminated sediments from mining sites has contaminated the surface sediments. Enrichment factor indicates moderately severe enrichment for Pb, minor enrichment for Mn, Zn, Ni, Fe and no enrichment for Cr and Cu. The Igeo values show higher concentration of Pb ranging in the scale of 3-4, which shows strong contamination due to high anthropogenic activity such as mining and terrestrial influences into the coastal regions. Correlation coefficient shows that most of the elements are associated with each other except Ni and Pb. Factor analysis reveals that Mn, Zn, Fe, Cr, Pb and Cu are having a significant loading and it indicates that these elements are mainly derived from similar origin. The cluster analysis clearly indicated that the mining areas are grouped under cluster 2 and non-mining areas are clustered under group 1. Copyright © 2017 Elsevier Ltd. All rights reserved.

Mineral resource potential of the Granite Chief Wilderness Study Area, Placer County, California

USGS Publications Warehouse

Harwood, David S.; Federspiel, Francis E.; Cather, Eric E.; Scott, Douglas F.

1982-01-01

Substantial deposits of sand, gravel, and glacial till suitable for construction materials occur within the area, but their inaccessibility and remoteness from major markets preclude their being classified as a resource. No potential for oil, gas, coal, or geothermal resources was identified.

40 CFR 440.145-440.147 - [Reserved

Code of Federal Regulations, 2011 CFR

2011-07-01

... 40 Protection of Environment 30 2011-07-01 2011-07-01 false [Reserved] 440.145-440.147 Section 440.145-440.147 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine Subcategory §§ 440.145...

40 CFR 440.145-440.147 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... 40 Protection of Environment 29 2010-07-01 2010-07-01 false [Reserved] 440.145-440.147 Section 440.145-440.147 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine Subcategory §§ 440.145...

The origin and geochemical characteristics of rutile in eluvial and fluvial-alluvial placers and quartz veins of the Menderes Massif from the Neoproterozoic Pan-African Belt, Western Turkey

NASA Astrophysics Data System (ADS)

Kuşcu, Mustafa; Cengiz, Oya; Işık, Kayhan; Gül, E. Kübra

2018-07-01

Rutile occur in important amounts within Quaternary detrital sediments, and quartz veins which cut down the Paleozoic aged Eşme formation in the Menderes Massif on the Neoproterozoic Pan-Afrikan Belt in the west of Turkey. As a result of erosion, transport and accumulation of rutile-bearing quartz veins in the mica schists of the Eşme formation outcropped between Eşme (Uşak) and Kula (Manisa), the placer rutile occurrences occur in terraces, fluvial-alluvial and eluvial deposits. This study investigates the element content of rutile, oxygen isotope ratios of rutile and quartz, and formation temperature of rutile related to titanium source rock. Field observations show that rutiles are located in quartz veins that cut the schists. After these veins were fragmented and eroded, blocks of quartz with rutile and rutile grains are transported into clastic sediments in slope debris (eluvial), terraces and recent fluvial-alluvial deposits. Whereas quartz, rutile, ilmenite, and albite are found in the paragenesis of the rutile-bearing quartz vein fragments, the placers forming the terraces and current fluvial-alluvial deposits contain quartz, albite, muscovite, orthoclase, kaolinite, rutile, dravite, ilmenite, and zircon. The rutile grains in the examined placers and quartz vein fragments have grain sizes ranging from mm fractions to 5-6 cm. The major oxide compositions of the rutile grains have average values of 94 wt.% TiO2, 1.5 wt.% Fe2O3, 0.5 wt.% SiO2, and 0.3 wt.% Al2O3. The rutile samples have average values Nb of 1424 ppm, V of 980 ppm, W of 192 ppm, Ta of 94 ppm, and Zr of 73 ppm. The rutiles in the study area are defined as iron-rich rutile "nigrine" due to high iron content. Quartz veins are host rocks of rutile grains in the terrace and fluvial-aluvial sediments. The rutile-bearing quartz veins may be sourced from the Lower-Middle Miocene aged granites which are intruded the rocks in the Menderes Massif. Based on the analysis results of the methods of Zr thermometer from Zr values containing rutile and quartz-rutile geothermometer from oxygen isotope results (13.5‰ and 6‰) of quartz and rutile samples, the formation temperature of the rutile-bearing quartz veins were found to be at temperatures of 537 °C and 561 °C, respectively. These temperatures indicate that the rutile-bearing quartz veins may be in a temperature range between pegmatitic and/or hydrothermal stages.

40 CFR 440.142 - Effluent limitations representing the degree of effluent reduction attainable by the application...

Code of Federal Regulations, 2013 CFR

2013-07-01

... degree of effluent reduction attainable by the application of the best practicable control technology... Placer Mine Subcategory § 440.142 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT). Except as...

40 CFR 440.54 - New source performance standards (NSPS).

Code of Federal Regulations, 2011 CFR

2011-07-01

... attainable by the applications of the best available demonstrated technology (BADT): (a) The concentration of pollutants discharged in mine drainage from mines obtaining titanium ores from lode deposits shall not exceed... pollutants discharged in mine drainage from mines engaged in the dredge mining of placer deposits of sands...

40 CFR 440.142 - Effluent limitations representing the degree of effluent reduction attainable by the application...

Code of Federal Regulations, 2014 CFR

2014-07-01

... degree of effluent reduction attainable by the application of the best practicable control technology... Placer Mine Subcategory § 440.142 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT). Except as...

40 CFR 440.54 - New source performance standards (NSPS).

Code of Federal Regulations, 2010 CFR

2010-07-01

... attainable by the applications of the best available demonstrated technology (BADT): (a) The concentration of pollutants discharged in mine drainage from mines obtaining titanium ores from lode deposits shall not exceed... pollutants discharged in mine drainage from mines engaged in the dredge mining of placer deposits of sands...

40 CFR 440.142 - Effluent limitations representing the degree of effluent reduction attainable by the application...

Code of Federal Regulations, 2012 CFR

2012-07-01

... degree of effluent reduction attainable by the application of the best practicable control technology... Placer Mine Subcategory § 440.142 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT). Except as...

77 FR 65167 - Blacksmith Ecological Restoration Project, Eldorado National Forest, Placer and El Dorado...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-10-25

...; mastication of select, existing plantations with a follow- up treatment of herbicides to reduce brush... herbicide; prescribed burning, and associated roadwork. DATES: Comments concerning the scope of the analysis... follow-up herbicide application if brush cover returns at greater than 30% following initial treatment...

1. West portal of Tunnel 27 in distance, contextual view ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. West portal of Tunnel 27 in distance, contextual view to northeast looking past Tunnel 26 (HAER CA-202) from atop east portal of Tunnel 25 (HAER CA-201), 380mm lens. - Central Pacific Transcontinental Railroad, Tunnel No. 27, Milepost 133.9, Applegate, Placer County, CA

3. East portal of Tunnel 25, contextual view to southwest ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. East portal of Tunnel 25, contextual view to southwest from atop Tunnel 26 (HAER CA-202), with the original Central Pacific Transcontinental line passing above the new line, 135mm lens. - Central Pacific Transcontinental Railroad, Tunnel No. 25, Milepost 133.09, Applegate, Placer County, CA

40 CFR 52.256 - Control of evaporative losses from the filling of vehicular tanks.

Code of Federal Regulations, 2010 CFR

2010-07-01

... the Metropolitan Los Angeles and Sacramento Valley Intrastate Air Quality Control Regions, except as.... (ii) El Dorado County APCD (Mountain Counties Air Basin portion). (iii) Placer County APCD (Mountain... dispensing tank or to an adsorption, absorption, incineration, refrigeration-condensation system or its...

40 CFR 52.256 - Control of evaporative losses from the filling of vehicular tanks.

Code of Federal Regulations, 2014 CFR

2014-07-01

... the Metropolitan Los Angeles and Sacramento Valley Intrastate Air Quality Control Regions, except as.... (ii) El Dorado County APCD (Mountain Counties Air Basin portion). (iii) Placer County APCD (Mountain... dispensing tank or to an adsorption, absorption, incineration, refrigeration-condensation system or its...

40 CFR 52.256 - Control of evaporative losses from the filling of vehicular tanks.

Code of Federal Regulations, 2011 CFR

2011-07-01

... the Metropolitan Los Angeles and Sacramento Valley Intrastate Air Quality Control Regions, except as.... (ii) El Dorado County APCD (Mountain Counties Air Basin portion). (iii) Placer County APCD (Mountain... dispensing tank or to an adsorption, absorption, incineration, refrigeration-condensation system or its...

40 CFR 52.256 - Control of evaporative losses from the filling of vehicular tanks.

Code of Federal Regulations, 2012 CFR

2012-07-01

... the Metropolitan Los Angeles and Sacramento Valley Intrastate Air Quality Control Regions, except as.... (ii) El Dorado County APCD (Mountain Counties Air Basin portion). (iii) Placer County APCD (Mountain... dispensing tank or to an adsorption, absorption, incineration, refrigeration-condensation system or its...

40 CFR 52.256 - Control of evaporative losses from the filling of vehicular tanks.

Code of Federal Regulations, 2013 CFR

2013-07-01

... the Metropolitan Los Angeles and Sacramento Valley Intrastate Air Quality Control Regions, except as.... (ii) El Dorado County APCD (Mountain Counties Air Basin portion). (iii) Placer County APCD (Mountain... dispensing tank or to an adsorption, absorption, incineration, refrigeration-condensation system or its...

43 CFR 3832.21 - How do I locate a lode or placer mining claim?

Code of Federal Regulations, 2013 CFR

2013-10-01

... bearing gold or valuable detrital minerals; (ii) Hosted in soils, alluvium (deposited by water), eluvium...) Bedded gypsum, limestone, cinders, pumice, and similar mineral deposits; or (iv) Mineral-bearing brine...) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) LOCATING MINING CLAIMS...

43 CFR 3832.21 - How do I locate a lode or placer mining claim?

Code of Federal Regulations, 2014 CFR

2014-10-01

... bearing gold or valuable detrital minerals; (ii) Hosted in soils, alluvium (deposited by water), eluvium...) Bedded gypsum, limestone, cinders, pumice, and similar mineral deposits; or (iv) Mineral-bearing brine...) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) LOCATING MINING CLAIMS...

43 CFR 3832.21 - How do I locate a lode or placer mining claim?

Code of Federal Regulations, 2011 CFR

2011-10-01

... bearing gold or valuable detrital minerals; (ii) Hosted in soils, alluvium (deposited by water), eluvium...) Bedded gypsum, limestone, cinders, pumice, and similar mineral deposits; or (iv) Mineral-bearing brine...) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) LOCATING MINING CLAIMS...

43 CFR 3832.21 - How do I locate a lode or placer mining claim?

Code of Federal Regulations, 2012 CFR

2012-10-01

... bearing gold or valuable detrital minerals; (ii) Hosted in soils, alluvium (deposited by water), eluvium...) Bedded gypsum, limestone, cinders, pumice, and similar mineral deposits; or (iv) Mineral-bearing brine...) BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) LOCATING MINING CLAIMS...

Water-quality, bed-sediment, and biological data, for streams in the upper Prickly Pear Creek watershed, Montana, 2001

USGS Publications Warehouse

Klein, Terry L.; Thamke, Joanna N.; Harper, David D.; Farag, Aïda M.; Nimick, David A.; Fey, David L.

2003-01-01

The upper Prickly Pear Creek watershed encompasses the upstream 15 miles of Prickly Pear Creek, south of Helena, Montana (fig. 1). The headwaters of Prickly Pear Creek and its tributaries (Beavertown Creek, Clancy Creek, Dutchman Creek, Golconda Creek, Lump Gulch, Spring Creek, and Warm Springs Creek) are primarily in the Helena National Forest, whereas the central part of the watershed primarily is within either Bureau of Land Management (BLM) or privately owned property. Three mining districts are present in the upper Prickly Pear Creek watershed: Alhambra, Clancy, and Colorado. Numerous prospects, adits, tailings piles, mills, dredge piles, and mines (mostly inactive) are located throughout the watershed. These districts contain polymetallic (Ag, Au, Cu, Pb, Zn) vein deposits and precious-metal (Au-Ag) vein and disseminated deposits that were exploited beginning in the 1860’s. Placer Au deposits in the major streams were extensively mined in the late 1800’s and early 1900’s.As part of a cooperative effort with Federal land management agencies, the U.S. Geological Survey (USGS) is currently using an integrated approach to investigate two mining impacted watersheds in the western United States (the Animas River in Colorado and the Boulder River in Montana). These studies provide the USDA Forest Service and BLM scientific data for implementing informed land-management decisions regarding cleanup of abandoned mine lands within each watershed. A similar integrated-science approach will be used to characterize the upper Prickly Pear Creek watershed with respect to water and streambed sediment chemistry, aquatic biota, and geologic framework. This integrated database presents data that will be used to identify important pathways of metals movement and biological impacts, thereby guiding resource management decisions of land-managers in several publications that are in preparation. Watershed-level characterization in terms of water quality, streambed sediment chemistry, and fish health will facilitate determinations of whether removal of contaminated materials or other cleanup activities are necessary, planning of short- and long-term restoration efforts, and development of a monitoring plan to document cleanup effectiveness.

Principal thorium resources in the United States

USGS Publications Warehouse

Staatz, Mortimer Hay; Armbrustmacher, T.J.; Olson, J.C.; Brownfield, I.K.; Brock, M.R.; Lemons, J.F.; Coppa, L.V.; Clingan, B.V.

1979-01-01

Resources were assessed for thorium in the higher grade and better known deposits in the United States in: (1) veins, (2) massive carbonatites, (3) stream placers of North and South Carolina, and (4) disseminated deposits. Thorium resources for the first three categories were divided into reserves and probable potential resources. Each of these then were separated into the following cost categories: (1) the amount of ThO2 producible at less than $15 per pound, (2) the amount producible at between $15 and $30 per pound, and (3) the amount producible at more than $50 per pound. The type of mining and milling needed at each deposit determines the capital, operating, and fixed costs of both mining and milling. Costs start with the clearing of land and are carried through to the final product, which for all deposits is ThO2. Capital costs of mining are affected most by the type of mining and the size of the mine. Those of milling are affected most by the kind of mill, its size, and whether or not extra circuits are needed for the separation of rare earths or some other byproduct. Veins, massive carbonatites, and stream placers of North and South Carolina have reserves of 188,000 short tons of ThO2 and probable potential resources of 505,000 tons of ThO2. Approximately half of the reserves and probable potential resources can be produced at less than $30 per pound of ThO2. Veins are the highest grade source in the United States and have total reserves of 142,000 tons of ThO2 and probable potential resources of 343,000 tons. About 90 percent of the reserves and 91 percent of the probable potential resources can be produced at less than $15 per pound of ThO2. Seven vein districts were evaluated: (1) Lemhi Pass, Mont.-Idaho, (2) Wet Mountains, Colo., (3) Powderhorn, Colo., (4) Hall Mountain, Idaho, (5) Diamond Creek, Idaho, (6) Bear Lodge Mountains, Wyo. and (7) Mountain Pass, Calif. Eighty-seven percent of the total reserves and probable potential resources are in the Lemhi Pass and Wet Mountains Districts. The first district has reserves of 68,000 tons of ThO2 and probable potential resources of 124,000 tons that can be produced at less than $15 per pound; the second district has 54,000 tons of reserves and 141,000 tons of probable potential resources producible at less than $15 per pound. Rare earths are a common byproduct, and in many veins they are from one-half to several times as abundant as thorium. Massive carbonatite bodies are large-tonnage low-grade deposits. Thorium in these deposits would be a byproduct either of rare earth or of niobium mining. The Iron Hill carbonatite body in the Powderhorn district, Colorado, and the Sulfide Queen carbonatite body in the Mountain Pass district, California, were evaluated. These two deposits contain 40,800 tons of ThO2 in reserves and 125,000 tons of ThO2 in probable potential resources. More than 80 percent of this total is in the Iron Hill carbonatite. This thorium is entirely a byproduct and is producible at less than $15 per pound of ThO2. The Sulphide Queen massive carbonatite deposit was being mined in 1977 for rare earths, and thorium could be recovered by adding an extra circuit to the existing mill. Stream placers in North and South Carolina occur both in the Piedmont and just east of the Fall Line. The reserves of these deposits total 5,270 tons of ThO2, and the probable potential resources are 36,800 tons of ThO2. The Piedmont placers are all too small to produce ThO2 at a cost of less than $50 per pound. One placer on Hollow Creek, S.C., just east of the Fall Line had reserves of 2,040 tons of ThO2 that is producible at between $15 and $30 per pound. Thorium occurs in monazite in these placers. Other heavy minerals that would be recovered with the monazite include rutile, zircon, and ilmenite. In addition to thorium, monazite contains large amounts of rare earths and small amounts of uranium; both can be recovered during the process that separates thorium fr

78 FR 42018 - Determination of Attainment for the Sacramento Nonattainment Area for the 2006 Fine Particle...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-07-15

... control agencies in the area: Sacramento Metropolitan Air Quality Management District, Placer County Air Pollution Control District, and Yolo-Solano Air Quality Management District. Based on these reviews, EPA..., 2007) (Miami, Arizona area); and 75 FR 27944 (May 19, 2010) (Coso Junction, California area). Thus EPA...

2. West portal of Tunnel 1, view to northeast, 135mm ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. West portal of Tunnel 1, view to northeast, 135mm lens. Like the new tunnels built during this period, Tunnel 1 received a new concrete portal face with granite masonry voussoirs and coping. - Central Pacific Transcontinental Railroad, Tunnel No. 1, Milepost 164.34, Blue Canyon, Placer County, CA

40 CFR 440.142 - Effluent limitations representing the degree of effluent reduction attainable by the application...

Code of Federal Regulations, 2011 CFR

2011-07-01

... degree of effluent reduction attainable by the application of the best practicable control technology... (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine... application of the best practicable control technology currently available (BPT). Except as provided in 40 CFR...

Automated Essay Scoring versus Human Scoring: A Comparative Study

ERIC Educational Resources Information Center

Wang, Jinhao; Brown, Michelle Stallone

2007-01-01

The current research was conducted to investigate the validity of automated essay scoring (AES) by comparing group mean scores assigned by an AES tool, IntelliMetric [TM] and human raters. Data collection included administering the Texas version of the WriterPlacer "Plus" test and obtaining scores assigned by IntelliMetric [TM] and by…

40 CFR 440.142 - Effluent limitations representing the degree of effluent reduction attainable by the application...

Code of Federal Regulations, 2010 CFR

2010-07-01

... (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS ORE MINING AND DRESSING POINT SOURCE CATEGORY Gold Placer Mine... 40 Protection of Environment 29 2010-07-01 2010-07-01 false Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology...

3. East portal of Tunnel 34, view to southsouthwest, 135mm ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. East portal of Tunnel 34, view to south-southwest, 135mm lens with electronic flash fill. Note the shift, in these later tunnels east of Colfax, to concrete portal faces with granite masonry voussoirs and coping. - Central Pacific Transcontinental Railroad, Tunnel No. 34, Milepost 145.4, Colfax, Placer County, CA

Providing Homeless Adults with Advantage: A Sustainable University Degree Program

ERIC Educational Resources Information Center

Sinatra, Richard; Lanctot, Melissa Kim

2016-01-01

A university partnered with the New York City Department of Homeless Services (NYC DHS) to provide cohorts of adults a 60-credit Associate Degree Program in Business Administration over a 2-year period. Results of two cohorts of 30 Advantage Academy Program graduates revealed significant improvement in College Board AccuPlacer (ACPL) Arithmetic…

43 CFR 3863.1-2 - Proof of improvements for patent.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 43 Public Lands: Interior 2 2013-10-01 2013-10-01 false Proof of improvements for patent. 3863.1-2... MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT APPLICATIONS Placer Mining Claim Patent Applications § 3863.1-2 Proof of improvements for patent. The proof of improvements must...

43 CFR 3863.1-2 - Proof of improvements for patent.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 43 Public Lands: Interior 2 2012-10-01 2012-10-01 false Proof of improvements for patent. 3863.1-2... MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT APPLICATIONS Placer Mining Claim Patent Applications § 3863.1-2 Proof of improvements for patent. The proof of improvements must...

43 CFR 3863.1-2 - Proof of improvements for patent.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 43 Public Lands: Interior 2 2014-10-01 2014-10-01 false Proof of improvements for patent. 3863.1-2... MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT APPLICATIONS Placer Mining Claim Patent Applications § 3863.1-2 Proof of improvements for patent. The proof of improvements must...

43 CFR 3863.1-2 - Proof of improvements for patent.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 43 Public Lands: Interior 2 2011-10-01 2011-10-01 false Proof of improvements for patent. 3863.1-2... MANAGEMENT, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT (3000) MINERAL PATENT APPLICATIONS Placer Mining Claim Patent Applications § 3863.1-2 Proof of improvements for patent. The proof of improvements must...

SHUTTLE IMAGING RADAR PROVIDES FRAMEWORK FOR SUBSURFACE GEOLOGIC EXPLORATION IN EGYPT AND SUDAN.

USGS Publications Warehouse

Breed, Carol S.; McCauley, John F.; Schaber, Gerald G.

1984-01-01

Shuttle Imaging Radar provides a pictorial framework to guide exploration for mineral resources (potential placers), groundwater sources, and prehistoric archaeological sites in the Western Desert of Egypt and Sudan. Documented penetration by the SIR-A signal of dry surficial sediment to depths of a meter or more revealed bedrock geologic features and networks of former stream valleys otherwise concealed beneath windblown sand, alluvium, and colluvial deposits. 'Radar units' mapped on SIR-A images according to relative brightness and degree of mottling correspond to subsurface geologic and topographic features identified in more than 50 test pits. Petrologic examination of pit samples confirms that a variety of depositional environments existed in this now hyper-arid region before it was mantled by windblown sand sheets and dunes. Wet sand was discovered in two buried valleys shown on the radar images and located in the field with the aid of co-registered maps and Landsat images, and a satellite navigation device. Buried valleys whose streams once traversed mineralized zones are potential sites of placers (gold, tin).

On the origin of (4)He and (40)Ar in natural gold

NASA Technical Reports Server (NTRS)

Eugster, O.; Hofmann, B.; Niedermann, S.; Thalmann, CH.

1993-01-01

In a first report on our investigations of noble gases in native gold we demonstrated that placer gold contains an excess of radiogenic (4)He and (40)Ar relative to the concentrations expected from in situ decay of U, Th, and K, respectively, during the geologic age of about 30 Ma of the samples. We also showed that the U/Th-(4)He age of 36 Ma of vein-type gold from the Southern Alps agrees with its K-Ar formation age derived from associated muscovite and biotite. We now studied the question of the origin of the (4)He and (40)Ar excesses of placer gold. We conclude that gold contains two components of noble gases, a low-temperature component from fluid inclusions or phases which release noble gases at less than 800 C and a high-temperature component released when gold melts (1064 C). In some samples extremely high U and K concentrations or an unreasonably high formation age would be required to explain the observed (4)He abundances. Thus, trapped (4)He and (40)Ar must be present in gold.

Stream restoration at Denali National Park and Preserve

USGS Publications Warehouse

Densmore, Roseann V.; Karle, Kenneth F.

1999-01-01

Placer mining for gold has severely disturbed many riparian ecosystems in northern regions. We are conducting a long-term project to test methods to promote restoration of a placer-mined watershed in Denali National Park and Preserve. The project included hydrological restoration of the unstable and excessively confined stream with heavy equipment. We stabilized the floodplain with bioengineering techniques, including alder and willow brush bars anchored laterally to the channel and willow cuttings along the channel. A moderate flood near the end of construction showed that the brush bars provided substantial protection, but some bank erosion and changes in slope and sinuosity occurred. Subsequent refinements included greater sinuosity and channel depth, pool/riffie construction with stone weirs, and buried alder and willow brush projecting from the bank. The reconstructed stream and floodplain have remained stable for five years, but have not been re-tested by a another large flood. The willow/alder riparian plant community is naturally revegetating on the new floodplains, but vigorous willows which sprouted from branches in brush bars and banks still provide the erosion protection.

78 FR 28776 - Approval and Promulgation of Implementation Plans; Georgia; State Implementation Plan...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-16

... Section of this Federal Register, EPA is approving the State's implementation plan revision as a direct... Promulgation of Implementation Plans; Georgia; State Implementation Plan Miscellaneous Revisions AGENCY... State Implementation Plan (SIP) submitted by the Georgia Environmental Protection Division to EPA in...

Impact of tsunami on texture and mineralogy of a major placer deposit in southwest coast of India

NASA Astrophysics Data System (ADS)

Babu, N.; Babu, D. S. Suresh; Das, P. N. Mohan

2007-03-01

The great Indonesian earth quake (26 December 2004) triggered a tsunami wave across the Bay of Bengal and Indian Ocean basins and has brought a major havoc in several countries including India. The coastal segment between Thotapalli and Valiazhikal in Kerala state of southwest India, where considerably rich beach placer deposit with ilmenite percentage of more than 70% is concentrated, has been investigated to understand the impact of tsunami on coastal sediments. The grain size analysis flashes out the significant differences between the pre- and post-tsunami littoral environments. While the mineral grains collected during pre-tsunami period show well-sorted nature, the post-tsunami samples represent moderately to poorly sorted nature. Similarly, unimodal and bimodal distributions of the sediments have been recorded for pre- and post-tsunami sediments, respectively. Further, mineral assemblages corresponding to before and after this major wave activity clearly indicate the large-scale redistribution of sediments. The post-tsunami sediments register increasing trends of garnet, sillimanite and rutile. The total heavy mineral percentage of the post-tsunami sediment also shows an improved concentration, perhaps due to the large-scale transport of lighter fraction. Magnetite percentage of post-tsunami samples reflects higher concentration compared to the pre-tsunami samples, indicating the intensity of reworking process. X-ray diffraction patterns of ilmenite grains have confirmed the increased presence of pseduorutile, and pseudobrookite in post-tsunami samples, which could be due to the mixing of more altered grains. SEM examination of grains also confirms the significant alteration patterns on the ubiquitous mineral of placer body, the ilmenite. The reason for these textural, mineralogical and micromorphological changes in heavy minerals particularly in ilmenite, could be due to the churning action on the deeper sediments of onshore region or on the sediments entrapped in the near shelf region of the area, by the ˜ 6 m high tsunami waves.

Preliminary report on mercury geochemistry of placer gold dredge tailings, sediments, bedrock, and waters in the Clear Creek restoration area, Shasta County, California

USGS Publications Warehouse

Ashley, Roger P.; Rytuba, James J.; Rogers, Ronald; Kotlyar, Boris B.; Lawler, David

2002-01-01

Clear Creek, one of the major tributaries of the upper Sacramento River, drains the eastern Trinity Mountains. Alluvial plain and terrace gravels of lower Clear Creek, at the northwest edge of the Sacramento Valley, contain placer gold that has been mined since the Gold Rush by various methods including dredging. In addition, from the 1950s to the 1980s aggregate-mining operations removed gravel from the lower Clear Creek flood plain. Since Clear Creek is an important stream for salmon production, a habitat restoration program is underway to repair damage from mining and improve conditions for spawning. This program includes using dredge tailings to fill in gravel pits in the flood plain, raising the concern that mercury lost to these tailings in the gold recovery process may be released and become available to biota. The purposes of our study are to determine concentrations and speciation of mercury in sediments, tailings, and water in the lower Clear Creek area, and to determine its mobility. Mercury concentrations in bedrock and unmined gravels both within and above the mined area are low, and are taken to represent background concentrations. Bulk mercury values in flood-plain sediments and dry tailings are elevated to several times these background concentrations. Mercury in sediments and tailings is associated with fine size fractions. Although methylmercury levels are generally low in sediments, shallow ponds in the flood plain may have above-normal methylation potential. Stream waters in the area show low mercury and methylmercury levels. Ponds with elevated methylmercury in sediments have more methylmercury in their waters as well. One seep in the area is highly saline, and enriched in mercury, lithium, and boron, similar to connate waters that are expelled along thrust faults to the south on the west side of the Sacramento Valley. This occurrence suggests that mercury in waters may at least in part be from sources other than placer mining.

76 FR 34690 - Placer County Water Agency; Notice of Application Accepted for Filing, Soliciting Motions To...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-14

... Water Agency; Notice of Application Accepted for Filing, Soliciting Motions To Intervene and Protests... Water Agency. e. Name of Project: Middle Fork American River Project. f. Location: The Middle Fork....S. Department of Agriculture-- Forest Service. g. Filed Pursuant to: Federal Power Act 16 U.S.C. 791...

Age structure and growth of California black oak (Quercus kelloggii) in the central Sierra Nevada, California

Treesearch

Barrett A. Garrison; Christopher D. otahal; Matthew L. Triggs

2002-01-01

Age structure and growth of California black oak (Quercus kelloggii) was determined from tagged trees at four 26.1-acre study stands in Placer County, California. Stands were dominated by large diameter (>20 inch dbh) California black oak and ponderosa pine (Pinus ponderosa). Randomly selected trees were tagged in June-August...

Timber resource statistics for the Sacramento resource area of California.

Treesearch

Karen L. Waddell; Patricia M. Bassett

1997-01-01

This report is a summary of timber resource statistics for the Sacramento Resource Area of California, which includes Butte, Colusa, El Dorado, Glenn, Lake, Napa, Nevada, Placer, Plumas, Sacramento, Sierra, Sutter, Tehama, Yolo, and Yuba Counties. Data were collected as part of a statewide multiresource inventory. The inventory sampled private and public lands except...

Experiences with the MANA simulation tool

DTIC Science & Technology

2006-08-01

ALERT and FAVS simulations. Also, agents in these simulations needed to conduct careful formation fighting while following established CF doctrine...simulations auraient dû pouvoir se déplacer en formation , suivant la doctrine établie des Forces canadiennes. Cependant, des comportements d’une...29 Annex C – Alternative approach to inter-squad coordination of retreat.................................. 32 List of acronyms

50 CFR 600.1008 - Implementation plan and implementation regulations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 50 Wildlife and Fisheries 8 2010-10-01 2010-10-01 false Implementation plan and implementation... Capacity Reduction Framework § 600.1008 Implementation plan and implementation regulations. (a) As soon as... period, a proposed implementation plan and implementation regulations. During the public comment period...

77 FR 43205 - Notice of Data Availability for Approval, Disapproval and Promulgation of Implementation Plans...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-24

... Haze State Implementation Plan; Federal Implementation Plan for Regional Haze AGENCY: Environmental... (SIP) revision submitted by the State of Wyoming on January 12, 2011, that addresses regional haze...; Regional Haze State Implementation Plan; Federal Implementation Plan for Regional Haze; Proposed Rule (77...

78 FR 28775 - Approval and Promulgation of Implementation Plans; North Carolina; State Implementation Plan...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-16

... Promulgation of Implementation Plans; North Carolina; State Implementation Plan Miscellaneous Revisions AGENCY... a revision to the North Carolina State Implementation Plan submitted on February 3, 2010, through... particulate matter found in the Code of Federal Regulations. In the Final Rules Section of this Federal...

77 FR 66607 - Placer County Water Agency; Notice of Application for Approval of Contract for the Sale of Power...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-11-06

... contract with Pacific Gas and Electric Company (PG&E) for two months beyond the expiration of the current... of two major storage reservoirs, five smaller reservoirs and diversion pools, and five powerhouses... Water Agency; Notice of Application for Approval of Contract for the Sale of Power for a Period...

Mineral resource of the month: gold

USGS Publications Warehouse

George, Micheal W.

2009-01-01

The article presents information on the valuable mineral called gold. It states that early civilizations valued gold because of its scarcity, durability and characteristics yellow color. By the late 20th century, gold was used as an industrial metal because of its unique physicochemical properties. The U.S. has several productive deposits of gold, including placer, gold-quartz lode, epithermal and Carlin-type gold deposits.

Environmental Assessment of Beale AFB Grazing Lease Program

DTIC Science & Technology

2012-12-01

Beale AFB will use livestock (cattle, sheep and goats ) on its properties throughout the year as needed for the control of noxious weeds, reduction...initiating a wildfire. California Farm Bureau Federation policy recognizes that grazing is the most practical and environmentally acceptable way to...Site Monitoring Well Installation and Annual Targeted Goat Grazing Project, Placer County, California. 21 September 2011.  

5. East portal of Tunnel 28, view to southsouthwest, 135mm ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. East portal of Tunnel 28, view to south-southwest, 135mm lens. Shed above portal appears to have housed machinery connected with a counterweighted curtain mechanism used to help dissipate smoke from this 3,209-foot tunnel during the days of steam locomotive use - Central Pacific Transcontinental Railroad, Tunnel No. 28, Milepost 134.75, Applegate, Placer County, CA

1. West portal of Tunnel 26, contextual view to northeast ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. West portal of Tunnel 26, contextual view to northeast from atop Tunnel 25 (HAER CA-201), with Tunnel 27 (HAER CA-203) visible in distance, 210mm lens. View is along new line, with original Central Pacific Transcontinental line crossing over the top above Tunnel 26. - Central Pacific Transcontinental Railroad, Tunnel No. 26, Milepost 133.29, Applegate, Placer County, CA

1. East portal of Tunnel 3, view to west, 135mm ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. East portal of Tunnel 3, view to west, 135mm lens. This tunnel was photographed to provide context, because even though somewhat enlarged, it illustrates the nature of the unlined hard rock tunnels typical of the original Central Pacific construction in 1868. - Central Pacific Transcontinental Railroad, Tunnel No. 3, Milepost 180.65, Cisco, Placer County, CA

40 CFR 440.100 - Applicability; description of the copper, lead, zinc, gold, silver, and molybdenum ores subcategory.

Code of Federal Regulations, 2011 CFR

2011-07-01

... any combination of these ores; (3) Mines and mills that use dump, heap, in-situ leach, or vat-leach... operations other than placer deposits; (2) Mills that use the froth-flotation process alone or in conjunction... not apply to discharges from the Quartz Hill Molybdenum Project in the Tongass National Forest, Alaska...

40 CFR 440.100 - Applicability; description of the copper, lead, zinc, gold, silver, and molybdenum ores subcategory.

Code of Federal Regulations, 2010 CFR

2010-07-01

... any combination of these ores; (3) Mines and mills that use dump, heap, in-situ leach, or vat-leach... operations other than placer deposits; (2) Mills that use the froth-flotation process alone or in conjunction... not apply to discharges from the Quartz Hill Molybdenum Project in the Tongass National Forest, Alaska...

For Whom the Bell Tolls and the Birth of the New Auteur Movement.

ERIC Educational Resources Information Center

Kerns, H. Dan

The state of the motion picture industry is reviewed, focusing on needed change in the practice of product placement. The study of the placements of advertising in films should be of interest to the student of visual literacy. Product placers are using films to advertise their products to entertainment seekers. The viewer, often a child, may not…

The Placer Media Management System or Using the Computer in the Small Film Library.

ERIC Educational Resources Information Center

Luckey, Jacqueline

In describing this media management system, which currently serves 84 public schools (K-12) in four rural counties east of Sacramento, this report suggests that the computer is a practical solution for film libraries trying to keep pace with increased use while not reducing their expenditures for purchasing and repairing film stock. The major…

Timber resource statistics of the Sacramento resource area of California.

Treesearch

J.D. Lloyd; Joel Moen; Charles L. Bolsinger

1986-01-01

This report is one of five that provide timber resource statistics for 57 of the 58 counties in California (San Francisco is excluded). This report presents statistics from a 1981-84 inventory of the timber resources of Butte, Colusa, El Dorado, Glenn, Lake, Napa, Nevada, Placer, Plumas, Sacramento, Sierra, Sutter, Tehama, Yolo, and Yuba Counties. Tables presented are...

Mercury contamination from historical gold mining in California

USGS Publications Warehouse

Alpers, Charles N.; Hunerlach, Michael P.; May, Jason T.; Hothem, Roger L.

2005-01-01

Mercury contamination from historical gold mines represents a potential risk to human health and the environment. This fact sheet provides background information on the use of mercury in historical gold mining and processing operations in California, with emphasis on historical hydraulic mining areas. It also describes results of recent USGS projects that address the potential risks associated with mercury contamination. Miners used mercury (quicksilver) to recover gold throughout the western United States. Gold deposits were either hardrock (lode, gold-quartz veins) or placer (alluvial, unconsolidated gravels). Underground methods (adits and shafts) were used to mine hardrock gold deposits. Hydraulic, drift, or dredging methods were used to mine the placer gold deposits. Mercury was used to enhance gold recovery in all the various types of mining operations; historical records indicate that more mercury was used and lost at hydraulic mines than at other types of mines. On the basis of USGS studies and other recent work, a better understanding is emerging of mercury distribution, ongoing transport, transformation processes, and the extent of biological uptake in areas affected by historical gold mining. This information has been used extensively by federal, state, and local agencies responsible for resource management and public health in California.

Stream and floodplain restoration in a riparian ecosystem disturbed by placer mining

USGS Publications Warehouse

Karle, Kenneth F.; Densmore, Roseann V.

1994-01-01

Techniques for the hydrologic restoration of placer-mined streams and floodplains were developed in Denali National Park and Preserve Alaska, USA. The hydrologic study focused on a design of stream and floodplain geometry using hydraulic capacity and shear stress equations. Slope and sinuosity values were based on regional relationships. Design requirements include a channel capacity for a 1.5-year (bankfull) discharge and a floodplain capacity for a 1.5- to 100-year discharge. Concern for potential damage to the project from annual flooding before natural revegetation occurs led to development of alder (Alnus crispa) brush bars to dissipate floodwater energy and encourage sediment deposition. The brush bars, constructed of alder bundles tied together and anchored laterally adjacent to the channel, were installed on the floodplain in several configurations to test their effectiveness. A moderate flood near the end of the two-year construction phase of the project provided data on channel design, stability, floodplain erosion, and brush bar effectiveness. The brush bars provided substantial protection, but unconsolidated bank material and a lack of bed armour for a new channel segment led to some bank erosion, slope changes and an increase in sinuosity in several reaches of the study area.

Approved Air Quality Implementation Plans in Region 10

EPA Pesticide Factsheets

Landing page for information about EPA-approved air quality State Implementation Plans (SIPs), Tribal Implementation Plans (TIPs), and Federal Implementation Plans (FIPs) in Alaska, Idaho, Oregon, Washington.

78 FR 69625 - Approval and Promulgation of Implementation Plans; New York State Ozone Implementation Plan Revision

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-20

...] Approval and Promulgation of Implementation Plans; New York State Ozone Implementation Plan Revision AGENCY...) is proposing to approve a revision to the New York State Implementation Plan (SIP) for ozone... air quality standards for ozone. DATES: Comments must be received on or before December 20, 2013...

77 FR 13974 - Approval and Promulgation of Implementation Plans; New York State Ozone Implementation Plan Revision

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-08

... Promulgation of Implementation Plans; New York State Ozone Implementation Plan Revision AGENCY: Environmental... a proposed revision to the New York State Implementation Plan (SIP) for ozone concerning the control... national ambient air quality standards for ozone. DATES: Effective Date: This rule will be effective April...

Approved Air Quality Implementation Plans in The Virgin Islands

EPA Pesticide Factsheets

This site contains information about air quality regulations called State Implementation Plans (SIPs), Federal Implementation Plans (FIPs), and Tribal Implementation Plans (TIPs) approved by EPA within the U.S. Virgin Islands.

77 FR 48061 - Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Regional Haze State...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-08-13

... Promulgation of Air Quality Implementation Plans; Pennsylvania; Regional Haze State Implementation Plan...'s limited approval of Pennsylvania's Regional Haze State Implementation Plan (SIP). DATES: Effective... announcing our limited approval of Pennsylvania's Regional Haze SIP. In this document, we inadvertently...

JPRS Report, Science & Technology USSR: Chemistry

DTIC Science & Technology

1991-06-20

extremely water -intensive technological process that results in the pollution of natural waters by finely dispersed silt-and-clay suspensions that...against pollution . This review examines ways and means of reagent conditioning of circulating and waste waters during the development of placer deposits...in Water by Using Porous Sulfo Cation Exchange Resin [A. V Mamchenko, M.S. Novozhenyuk; KHIMIYA I TEKHNOLOGIYA VODY, Vol 13 No 1, Jan 91] ... 5

Hydrogeochemical exploration: a reconnaissance study on northeastern Seward Peninsula, Alaska: Chapter A in Studies by the U.S. Geological Survey in Alaska, vol. 15

USGS Publications Warehouse

Graham, Garth E.; Taylor, Ryan D.; Buckley, Steve

2015-01-01

A reconnaissance hydrogeochemical study employing high-resolution/high-sensitivity inductively coupled plasma mass spectrometry analysis of stream and seep water samples (n= 171) was conducted in an area of limited bedrock exposure on the northeastern Seward Peninsula, Alaska. Sampling was focused in drainages around four main areas—at the Anugi Pb-Zn-Ag occurrence and in streams upstream of historically and currently mined placer gold deposits in the Candle Creek, Utica, and Monument Mountain areas. The objective of the study was to determine whether distribution of elevated metal concentrations in water samples could “see” through sediment cover and provide evidence of bedrock sources for base metals and gold. Some observations include (1) elevated Ag, As, Pb, and Zn concentrations relative to the study area as a whole in stream and seep samples from over and downstream of part of the Anugi Pb-Zn-Ag prospect; (2) abrupt downstream increases in Tl and Sb ± Au concentrations coincident with the upstream termination of productive placer deposits in the Inmachuk and Old Glory Creek drainages near Utica; (3) high K, Mo, Sb, and F throughout much of the Inmachuk River drainage near Utica; and (4) elevated As ± base metals and Au at two sites along Patterson Creek near the town of Candle and three additional contiguous sites identified when an 85th percentile cut-off was employed. Molybdenum ± gold concentrations (>90th percentile) were also measured in samples from three sites on Glacier Creek near Monument Mountain. The hydrogeochemistry in some areas is consistent with limited stream-sediment data from the region, including high Pb-Zn-Ag-As concentrations associated with Anugi, as well as historical reports of arsenopyrite-bearing veins upstream of placer operations in Patterson Creek. Chemistry of samples in the Inmachuk River-Old Glory Creek area also suggest more laterally extensive stibnite- (and gold-?) bearing veining than is currently known in the Old Glory Creek drainage. Our results indicate that hydrogeochemistry can be a useful method of geochemical exploration and offer targets for follow-up rock, soil, and subsurface sampling to ascertain the presence of mineralized bedrock.

Preliminary metallogenic belt and mineral deposit maps for northeast Asia

USGS Publications Warehouse

Obolenskiy, Alexander A.; Rodionov, Sergey M.; Dejidmaa, Gunchin; Gerel, Ochir; Hwang, Duk-Hwan; Distanov, Elimir G.; Badarch, Gombosuren; Khanchuk, Alexander I.; Ogasawara, Masatsugu; Nokleberg, Warren J.; Parfenov, Leonid M.; Prokopiev, Andrei V.; Seminskiy, Zhan V.; Smelov, Alexander P.; Yan, Hongquan; Birul'kin, Gennandiy V.; Davydov, Yuriy V.V.; Fridovskiy, Valeriy Yu.; Gamyanin, Gennandiy N.; Kostin, Alexei V.; Letunov, Sergey A.; Li, Xujun; Nikitin, Valeriy M.; Sotnikov, Sadahisa; Sudo, Vitaly I.; Spiridonov, Alexander V.; Stepanov, Vitaly A.; Sun, Fengyue; Sun, Jiapeng; Sun, Weizhi; Supletsov, Valeriy M.; Timofeev, Vladimir F.; Tyan, Oleg A.; Vetluzhskikh, Valeriy G.; Wakita, Koji; Yakovlev, Yakov V.; Zorina, Lydia M.

2003-01-01

The metallogenic belts and locations of major mineral deposits of Northeast Asia are portrayed on Sheets 1-4. Sheet 1 portrays the location of significant lode deposits and placer districts at a scale of 1:7,500,000. Sheets 2-4 portray the metallogenic belts of the region in a series of 12 time-slices from the Archean through the Quaternary at a scale of 1:15,000,000. For all four map sheets, a generalized geodynamics base map, derived from a more detailed map by Parfenov and others (2003), is used as an underlay for the metallogenic belt maps. This geodynamics map underlay permits depicts the major host geologic units and structures that host metallogenic belts. Four tables are included in this report. A hierarchial ranking of mineral deposit models is listed in Table 1. And summary features of lode deposits, placer districts, and metallogenic belts are described in Tables 2, 3, and 4, respectively. The metallogenic belts for Northeast Asia are synthesized, compiled, described, and interpreted with the use of modern concepts of plate tectonics, analysis of terranes and overlap assemblages, and synthesis of mineral deposit models. The data supporting the compilation are: (1) comprehensive descriptions of mineral deposits; (2) compilation and synthesis of a regional geodynamics map the region at 5 million scale with detailed explanations and cited references; and (3) compilation and synthesis of metallogenic belt maps at 15 million scale with detailed explanations and cited references. These studies are part of a major international collaborative study of the Mineral Resources, Metallogenesis, and Tectonics of Northeast Asia that is being conducted from 1997 through 2002 by geologists from earth science agencies and universities in Russia, Mongolia, Northeastern China, South Korea, Japan, and the USA. Companion studies and previous publications are: (1) a detailed geodynamics map of Northeast Asia (Parfenov and 2003); (2) a compilation of major mineral deposit models (Rodionov and Nokleberg, 2000; Rodionov and others, 2000; Obolenskiy and others, 2003); and (3) a database on significant metalliferous and selected nonmetalliferous lode deposits, and selected placer districts (Ariunbileg and others, 2003).

The distribution and composition of REE-bearing minerals in placers of the Atlantic and Gulf coastal plains, USA

USGS Publications Warehouse

Bern, Carleton R.; Shah, Anjana K.; Benzel, William M.; Lowers, Heather A.

2016-01-01

Rare earth element (REE) resources are currently of great interest because of their importance as raw materials for high-technology manufacturing. The REE-phosphates monazite (light REE enriched) and xenotime (heavy REE enriched) resist weathering and can accumulate in placer deposits as part of the heavy mineral assemblage. The Atlantic and Gulf coastal plains of the southeastern United States are known to host heavy mineral deposits with economic concentrations of zircon, ilmenite and rutile. This study provides a perspective on the distribution and composition of REE phosphate minerals in the region. The elemental chemistry and mineralogy of sands and associated heavy-mineral assemblages from new and archived sediment samples across the coastal plains are examined, along with phase-specific compositions of monazite, xenotime and zircon. Both monazite and xenotime are present across the coastal plains. The phase-specific compositions allow monazite content to be estimated using La as a geochemical proxy. Similarly, both Y and Yb are geochemical proxies for xenotime, but their additional presence in zircon and monazite require a correction to prevent overestimation of xenotime content. Applying this correction, maps of monazite and xenotime content across the coastal plains were generated using sample coverage from the National Geochemical Database (NGS) and National Uranium Resource Evaluation (NURE). The NGS and NURE approach of sampling stream sediments in small watersheds links samples to nearby lithologies. The results show an approximately 40 km-wide band of primarily Cretaceous, marine sediments bordering the Piedmont province from North Carolina to Alabama in which monazite and xenotime content are relatively high (up to 4.4 wt. % in < 150 μm bulk sediment). Strong correlations between concentrations of the two phases were found, with estimated monazite:xenotime ratios ranging approximately 6:1 to 12:1 depending upon the dataset analyzed. From a resource perspective, xenotime correlation with monazite indicates a heavy REE potential in coastal plain placers, and exploration may be warranted within the identified coastal plain band along the boundary of the Piedmont region.

Crystalline gold in soil and the problem of supergene nugget formation: Freezing and exclusion as genetic mechanisms

USGS Publications Warehouse

Watterson, J.R.

1985-01-01

Many of the world's richest gold placer deposits now occur in cold regions despite differences in their climatic history. It therefore seems possible that there may be some fundamental connection between freezing climates and the local chemical behavior of gold in the weathering cycle. This hypothesis, along with the problematical occurrence of gold as euhedral crystals in arctic gravel and soil placers, has led me to review low temperature phenomena that may bear on the geochemistry of gold. Several effects which may influence the weathering of natural gold-bearing rocks, the chemical complexation of gold, and its subsequent mobility and deposition appear to be strongly connected with freeze action. The exclusion of dissolved solutes, solute gases, and particles from ice, subjects rock and soil minerals to increased corrosion from thin, unfrozen, adsorbed water films which remain at particle surfaces throughout the freezing of rocks and soils. The preferential exclusion of cations (over anions) from growing ice crystals creates charge separations and measurable current flow across waterice phase boundaries in freezing soil - a phenomenon which leads to troublesome seasonal electrolytic corrosion of pipelines buried in soil; this phenomenon may also favor the dissolution of normally insoluble metals such as gold during geologic time periods. The ice-induced accumulation of clays, organic acids, bacteria, and other organic matter at mineral surfaces may also speed chemical attack by providing a nearby sink of alternate cation-binding sites and hence rapid removal of liberated cations from solution. The latter mechanism may be operative in both the dissolution and redeposition of gold. These physical, chemical, and electrical effects are favorable to the dissolution of rocks (in addition to frost shattering) and to the dissolution, mobilization, and redeposition of gold and other noble metals and must therefore contribute significantly to the behavior of gold at low temperatures. The occurrence of large numbers of gold placer deposits in northern Canada, Alaska, and Siberia may thus be due in part to the low temperatures common to these regions. ?? 1985.

77 FR 5191 - Approval and Promulgation of Air Quality Implementation Plans; District of Columbia; Regional...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-02

... Promulgation of Air Quality Implementation Plans; District of Columbia; Regional Haze State Implementation Plan... of Columbia Regional Haze Plan, a revision to the District of Columbia State Implementation Plan (SIP... existing anthropogenic impairment of visibility in mandatory Class I areas through a regional haze program...

24 CFR 598.605 - Implementation plan.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 24 Housing and Urban Development 3 2014-04-01 2013-04-01 true Implementation plan. 598.605 Section 598.605 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued... Grants § 598.605 Implementation plan. (a) Implementation plan content. An EZ must submit an...

77 FR 41279 - Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Regional Haze State...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-13

... Promulgation of Air Quality Implementation Plans; Pennsylvania; Regional Haze State Implementation Plan AGENCY... the Regional Haze State Implementation Plan (SIP) (hereafter RH SIP) revision submitted by the... anthropogenic impairment of visibility in mandatory Class I areas [[Page 41280

76 FR 12945 - Instructions for Implementing Climate Change Adaptation Planning in Accordance With Executive...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-09

... COUNCIL ON ENVIRONMENTAL QUALITY Instructions for Implementing Climate Change Adaptation Planning... Availability of Climate Change Adaptation Planning Implementing Instructions. SUMMARY: The Chair of the Council... for Implementing Climate Change Adaptation Planning are now available at: http://www.whitehouse.gov...

40 CFR 52.672 - Approval of plans.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Idaho § 52.672 Approval of plans. (a) Carbon Monoxide. (1) EPA approves as a revision to the Idaho State Implementation Plan, the Limited Maintenance Plan for.... [Reserved] (e) Particulate Matter. (1) EPA approves as a revision to the Idaho State Implementation Plan...

78 FR 17835 - Approval and Promulgation of Federal Implementation Plan for Oil and Natural Gas Well Production...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-22

...The EPA is taking final action to promulgate a Reservation- specific Federal Implementation Plan in order to regulate emissions from oil and natural gas production facilities located on the Fort Berthold Indian Reservation in North Dakota. The Federal Implementation Plan includes basic air quality regulations for the protection of communities in and adjacent to the Fort Berthold Indian Reservation. The Federal Implementation Plan requires owners and operators of oil and natural gas production facilities to reduce emissions of volatile organic compounds emanating from well completions, recompletions, and production and storage operations. This Federal Implementation Plan will be implemented by the EPA, or a delegated tribal authority, until replaced by a Tribal Implementation Plan. The EPA proposed a Reservation-specific Federal Implementation Plan concurrently with an interim final rule on August 15, 2012. This final Federal Implementation Plan replaces the interim final rule in all intents and purposes on the effective date of the final rule. The EPA is taking this action pursuant to the Clean Air Act (CAA).

24 CFR 598.605 - Implementation plan.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 24 Housing and Urban Development 3 2012-04-01 2012-04-01 false Implementation plan. 598.605 Section 598.605 Housing and Urban Development Regulations Relating to Housing and Urban Development... Empowerment Zone Grants § 598.605 Implementation plan. (a) Implementation plan content. An EZ must submit an...

24 CFR 598.605 - Implementation plan.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 24 Housing and Urban Development 3 2013-04-01 2013-04-01 false Implementation plan. 598.605 Section 598.605 Housing and Urban Development Regulations Relating to Housing and Urban Development... Empowerment Zone Grants § 598.605 Implementation plan. (a) Implementation plan content. An EZ must submit an...

78 FR 68005 - Approval and Promulgation of Implementation Plans; Mississippi; Transportation Conformity SIP...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-13

... this Federal Register, EPA is approving the State's implementation plan revision as a direct final rule...] Approval and Promulgation of Implementation Plans; Mississippi; Transportation Conformity SIP--Memorandum... proposing to approve a State Implementation Plan revision submitted by the Mississippi Department of...

Effective protection of open space: does planning matter?

PubMed

Steelman, Toddi A; Hess, George R

2009-07-01

High quality plans are considered a crucial part of good land use planning and often used as a proxy measure for success in plan implementation and goal attainment. We explored the relationship of open space plan quality to the implementation of open space plans and attainment of open space protection goals in Research Triangle, North Carolina, USA. To measure plan quality, we used a standard plan evaluation matrix that we modified to focus on open space plans. We evaluated all open space plans in the region that contained a natural resource protection element. To measure plan implementation and open space protection, we developed an online survey and administered it to open space planners charged with implementing the plans. The survey elicited each planner's perspective on aspects of open space protection in his or her organization. The empirical results (1) indicate that success in implementation and attaining goals are not related to plan quality, (2) highlight the importance of when and how stakeholders are involved in planning and implementation processes, and (3) raise questions about the relationship of planning to implementation. These results suggest that a technically excellent plan does not guarantee the long-term relationships among local land owners, political and appointed officials, and other organizations that are crucial to meeting land protection goals. A greater balance of attention to the entire decision process and building relationships might lead to more success in protecting open space.

1. West portal of Tunnel 1, contextual view to north, ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. West portal of Tunnel 1, contextual view to north, 135mm lens. The Central Pacific originally built Tunnel 1 in 1868; Southern Pacific widened it in 1913 to accommodate both the original and new mainline as it continued its double-tracking efforts east from Colfax to Blue CaÏon. - Central Pacific Transcontinental Railroad, Tunnel No. 1, Milepost 164.34, Blue Canyon, Placer County, CA

43 CFR 3832.22 - How much land may I include in my mining claim?

Code of Federal Regulations, 2011 CFR

2011-10-01

... claims. Lode claims must not exceed 1,500 by 600 feet. If there is a vein, lode, or ledge, each lode claim is limited to a maximum of 1,500 feet along the course of the vein, lode, or ledge and a maximum of 300 feet in width on each side of the middle of the vein, lode, or ledge. (b) Placer claims. (1...

WILD ROGUE WILDERNESS, OREGON.

USGS Publications Warehouse

Gray, Floyd; Miller, Michael S.

1984-01-01

A geologic, geochemical, and geophysical investigation and a survey of mines, prospects, and quarries were conducted to evaluate the mineral-resource potential of the Wild Rogue Wilderness, Oregon. Approximately 800 mining claims, one-third of which are placer gold locations, exist in or adjacent to the area. The Wild Rogue Wilderness has one area of probable resource for copper, lead, zinc, silver, and gold and two area of probable resource potential for gold.

Geology and ore deposits of the Breckenridge district, Colorado

USGS Publications Warehouse

Ransome, Frederick Leslie

1911-01-01

The Breckenridge district is situated in Summit County, Colo., 60 miles. west-southwest of Denver, near the crest of the Continental Divide, and is drained by Blue River, a tributary of the Grand. Placer mining began here in 1860, but it was not until about 1879 that attention was turned to lode mining. During the last five years gold dredging, after many failures, has become established as an important industry.

Succession on regraded placer mine spoil in Alaska, USA, in relation to initial site characteristics

USGS Publications Warehouse

Densmore, R.V.

1994-01-01

This study evaluated the rate and pattern of natural succession on regraded placer mine spoil in relation to initial substrate characteristics. The study site was the Glen Creek watershed of the Kantishna mining area of Denali National Park and Preserve, Alaska. After regrading, twelve 0.01-ha plots were established and substrate characteristics were measured. Natural plant succession was evaluated after five growing seasons. Three successional patterns were identified on the basis of plant community characteristics using cluster analysis, and were related to substrate characteristics. First, a riparian plant community with vigorous Salix alaxensis and Alnus crispa grew rapidly on topsoil that had been spread over the regraded spoil. Second, a similar plant community with less vigorous S. alaxensis developed more slowly on unprocessed spoil and spoil amended with a small amount of topsoil. Third, processed spoil remained almost bare of vegetation, although S. alaxensis was able to establish and persist in a stunted growth form. In contrast, Alnus crispa had difficulty establishing on processed spoil, but the few established seedlings grew well. Several substrate variables, including the proportion of silt and clay vs. sand, total nitrogen, and water retention capacity, were good predictors of the rate and pattern of succession. Total nitrogen was the best single predictor for the number of vigorous S. alaxensis.

78 FR 41731 - Source Specific Federal Implementation Plan for Implementing Best Available Retrofit Technology...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-07-11

... Federal Implementation Plan for Implementing Best Available Retrofit Technology for Four Corners Power... Implementation Plan (FIP) to implement the Best Available Retrofit Technology (BART) requirement of the Regional... given the uncertainties in the electrical market in Arizona, EPA is proposing to extend the date by...

78 FR 40654 - Approval, Disapproval and Promulgation of Implementation Plans; State of Wyoming; Regional Haze...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-07-08

..., Disapproval and Promulgation of Implementation Plans; State of Wyoming; Regional Haze State Implementation Plan; Federal Implementation Plan for Regional Haze; Notice of Public Hearings AGENCY: Environmental...) addressing regional haze under. We are making this change in response to letters submitted by the Governor of...

78 FR 78310 - Approval and Promulgation of Implementation Plans; North Carolina; Transportation Conformity...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-12-26

... Federal Register, EPA is approving the State's implementation plan revision as a direct final rule without...] Approval and Promulgation of Implementation Plans; North Carolina; Transportation Conformity Memorandum of... Implementation Plan submitted on July 12, 2013, through the North Carolina Department of Environment and Natural...

77 FR 58072 - Finding of Substantial Inadequacy of Implementation Plan; Call for California State...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-09-19

... Substantial Inadequacy of Implementation Plan; Call for California State Implementation Plan Revision; South Coast AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: In response to a... that the California State Implementation Plan (SIP) for the Los Angeles-South Coast Air Basin (South...

78 FR 30770 - Approval and Promulgation of Air Quality Implementation Plans; Illinois; Air Quality Standards...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-23

... Promulgation of Air Quality Implementation Plans; Illinois; Air Quality Standards Revision AGENCY... Illinois state implementation plan (SIP) to reflect current National Ambient Air Quality Standards (NAAQS... Implementation Plan at 35 Illinois Administrative Code part 243, which updates National Ambient Air Quality...

40 CFR 52.1392 - Federal Implementation Plan for the Billings/Laurel Area.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 40 Protection of Environment 4 2013-07-01 2013-07-01 false Federal Implementation Plan for the Billings/Laurel Area. 52.1392 Section 52.1392 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Montana § 52.1392 Federal Implementation Plan for...

40 CFR 52.1392 - Federal Implementation Plan for the Billings/Laurel Area.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 40 Protection of Environment 4 2012-07-01 2012-07-01 false Federal Implementation Plan for the Billings/Laurel Area. 52.1392 Section 52.1392 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Montana § 52.1392 Federal Implementation Plan for...

40 CFR 52.1392 - Federal Implementation Plan for the Billings/Laurel Area.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 40 Protection of Environment 4 2014-07-01 2014-07-01 false Federal Implementation Plan for the Billings/Laurel Area. 52.1392 Section 52.1392 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Montana § 52.1392 Federal Implementation Plan for...

40 CFR 52.1392 - Federal Implementation Plan for the Billings/Laurel Area.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 40 Protection of Environment 4 2011-07-01 2011-07-01 false Federal Implementation Plan for the Billings/Laurel Area. 52.1392 Section 52.1392 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Montana § 52.1392 Federal Implementation Plan for...

77 FR 16937 - Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Regional Haze State...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-23

... Promulgation of Air Quality Implementation Plans; West Virginia; Regional Haze State Implementation Plan AGENCY... limited disapproval of West Virginia's Regional Haze State Implementation Plan (SIP) revision. EPA is... mandatory Class I areas through a regional haze program. EPA is also approving this revision as meeting the...

77 FR 65151 - Finding of Substantial Inadequacy of Implementation Plan; Call for California State...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-10-25

... the Federal Register on September 19, 2012. In that action, in response to a remand by the Ninth... Substantial Inadequacy of Implementation Plan; Call for California State Implementation Plan Revision; South... State Implementation Plan (SIP) for the Los Angeles-South Coast Air Basin (South Coast) is substantially...

40 CFR 93.118 - Criteria and procedures: Motor vehicle emissions budget.

Code of Federal Regulations, 2012 CFR

2012-07-01

... PLANS Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and..., consultation among federal, State, and local agencies occurred; full implementation plan documentation was... response to comments that are required to be submitted with any implementation plan. EPA will document its...

40 CFR 93.118 - Criteria and procedures: Motor vehicle emissions budget.

Code of Federal Regulations, 2014 CFR

2014-07-01

... PLANS Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and..., consultation among federal, State, and local agencies occurred; full implementation plan documentation was... response to comments that are required to be submitted with any implementation plan. EPA will document its...

Sediment processes modelling below hydraulic mining: towards environmental impact mitigation

NASA Astrophysics Data System (ADS)

Chalov, Sergey R.

2010-05-01

Placer mining sites are located in the river valleys so the rivers are influenced by mining operations. Frequently the existing mining sites are characterized by low contribution to the environmental technologies. Therefore hydraulic mining alters stream hydrology and sediment processes and increases water turbidity. The most serious environmental sequences of the sediment yield increase occur in the rivers populated by salmon fish community because salmon species prefer clean water with low turbidity. For instance, the placer mining in Kamchatka peninsula (Far East of Russia) which is regarded to be the last global gene pool of wild salmon Oncorhynchus threatens the rivers ecosystems. System of man-made impact mitigation could be done through the exact recognition of the human role in hydrological processes and sediment transport especially. Sediment budget of rivers below mining sites is transformed according to the appearance of the man-made non-point and point sediment sources. Non-point source pollution occurs due to soil erosion on the exposed hillsides and erosion in the channel diversions. Slope wash on the hillsides is absent during summer days without rainfalls and is many times increased during rainfalls and snow melting. The nearness of the sources of material and the rivers leads to the small time of suspended load increase after rainfalls. The average time of material intake from exposed hillsides to the rivers is less than 1 hour. The main reason of the incision in the channel diversion is river-channel straightening. The increase of channel slopes and transport capacity leads to the intensive incision of flow. Point source pollution is performed by effluents both from mining site (mainly brief effluents) and from settling ponds (permanent effluents), groundwater seepage from tailing pits or from quarries. High rate of groundwater runoff is the main reason of the technological ponds overfilling. Intensive filtration from channel to ponds because of their nearness determines the water mass increase inside mining site. The predictive models were suggested to assess each of the mane-made processes contribution into the total sediment budget of the rivers below mining sites. The empirical data and theoretical and laboratory-derived correlations were used to obtain the predictive models for each processes of sediment supply. It was challenging to estimate specific erosion rate of washed exposed hillsides, channel incision, water supply conditions. Climatic and anthropogenic changes of water runoff also were simulated to decrease uncertainty of the proposed model. Application of the given approach to the hydraulic platinum-mining located in the Kamchatka peninsula (Koryak plateau, tributaries of the Vivenka River) gave the sediment budget of the placer-mined rivers and the total sediment yield supplied into the ocean from river basin. Polluted placer-mined rivers contribute about 30 % of the whole sediment yield of the Vivenka River. At the same time the catchment area of these rivers is less than 0,03 % from the whole Vivenka catchment area. Based on the sediment transport modeling the decision making system for controlling water pollution and stream community preservation was developed. Due to exposed hillside erosion prevention and settling pond system optimization the total decrease of sediment yield was up to 75 %.

40 CFR 49.10046 - Contents of implementation plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... Plan for the Cow Creek Band of Umpqua Indians of Oregon § 49.10046 Contents of implementation plan. The implementation plan for the Reservation of the Cow Creek Band of Umpqua Indians consists of the following rules...

Implementing a Capital Plan.

ERIC Educational Resources Information Center

Daigneau, William A.

2003-01-01

Addresses four questions regarding implementation of a long-term capital plan to manage a college's facilities portfolio: When should the projects be implemented? How should the capital improvements be implemented? What will it actually cost in terms of project costs as well as operating costs? Who will implement the plan? (EV)

40 CFR 52.1973 - Approval of plans.

Code of Federal Regulations, 2014 CFR

2014-07-01

...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Oregon § 52.1973 Approval of plans. (a) Carbon monoxide. (1) EPA approves as a revision to the Oregon State Implementation Plan, the Second... December 27, 2004. (2) EPA approves as a revision to the Oregon State Implementation Plan, the Salem carbon...

40 CFR 52.1973 - Approval of plans.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Oregon § 52.1973 Approval of plans. (a) Carbon monoxide. (1) EPA approves as a revision to the Oregon State Implementation Plan, the Second... December 27, 2004. (2) EPA approves as a revision to the Oregon State Implementation Plan, the Salem carbon...

40 CFR 52.1973 - Approval of plans.

Code of Federal Regulations, 2011 CFR

2011-07-01

...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Oregon § 52.1973 Approval of plans. (a) Carbon monoxide. (1) EPA approves as a revision to the Oregon State Implementation Plan, the Second... December 27, 2004. (2) EPA approves as a revision to the Oregon State Implementation Plan, the Salem carbon...

40 CFR 52.1973 - Approval of plans.

Code of Federal Regulations, 2013 CFR

2013-07-01

...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Oregon § 52.1973 Approval of plans. (a) Carbon monoxide. (1) EPA approves as a revision to the Oregon State Implementation Plan, the Second... December 27, 2004. (2) EPA approves as a revision to the Oregon State Implementation Plan, the Salem carbon...

49 CFR 633.27 - Implementation of a project management plan.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 7 2010-10-01 2010-10-01 false Implementation of a project management plan. 633... TRANSIT ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROJECT MANAGEMENT OVERSIGHT Project Management Plans § 633.27 Implementation of a project management plan. (a) Upon approval of a project management plan by...

49 CFR 633.27 - Implementation of a project management plan.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 7 2011-10-01 2011-10-01 false Implementation of a project management plan. 633... TRANSIT ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROJECT MANAGEMENT OVERSIGHT Project Management Plans § 633.27 Implementation of a project management plan. (a) Upon approval of a project management plan by...

49 CFR 633.27 - Implementation of a project management plan.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 7 2012-10-01 2012-10-01 false Implementation of a project management plan. 633... TRANSIT ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROJECT MANAGEMENT OVERSIGHT Project Management Plans § 633.27 Implementation of a project management plan. (a) Upon approval of a project management plan by...

49 CFR 633.27 - Implementation of a project management plan.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 7 2014-10-01 2014-10-01 false Implementation of a project management plan. 633... TRANSIT ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROJECT MANAGEMENT OVERSIGHT Project Management Plans § 633.27 Implementation of a project management plan. (a) Upon approval of a project management plan by...

49 CFR 633.27 - Implementation of a project management plan.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 7 2013-10-01 2013-10-01 false Implementation of a project management plan. 633... TRANSIT ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROJECT MANAGEMENT OVERSIGHT Project Management Plans § 633.27 Implementation of a project management plan. (a) Upon approval of a project management plan by...

76 FR 9706 - Finding of Substantial Inadequacy of Implementation Plan; Call for Iowa State Implementation Plan...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-22

... advance and available for prompt implementation once triggered. Section 110(k)(5) of the CAA provides that... Environmental protection, Air pollution control, Iowa, Particulate matter, State Implementation Plan. Dated...

Developing and Implementing a Citywide Asthma Action Plan: A Community Collaborative Partnership.

PubMed

Staudt, Amanda Marie; Alamgir, Hasanat; Long, Debra Lynn; Inscore, Stephen Curtis; Wood, Pamela Runge

2015-12-01

Asthma affects 1 in 10 children in the United States, with higher prevalence among children living in poverty. Organizations in San Antonio, Texas, partnered to design and implement a uniform, citywide asthma action plan to improve asthma management capacity in schools. The asthma action plan template was modified from that of the Global Initiative for Asthma. School personnel were trained in symptom recognition, actions to take, and use of equipment before the asthma action plan implementation. The annual Asthma Action Plan Summit was organized as a forum for school nurses, healthcare providers, and members of the community to exchange ideas and strategies on implementation, as well as to revise the plan. The asthma action plan was implemented in all 16 local school districts. Feedback received from school nurses suggests that the citywide asthma action plan resulted in improved asthma management and student health at schools. The evidence in this study suggests that community organizations can successfully collaborate to implement a citywide health initiative similar to the asthma action plan.

Participatory System Dynamics Modeling: Increasing Stakeholder Engagement and Precision to Improve Implementation Planning in Systems.

PubMed

Zimmerman, Lindsey; Lounsbury, David W; Rosen, Craig S; Kimerling, Rachel; Trafton, Jodie A; Lindley, Steven E

2016-11-01

Implementation planning typically incorporates stakeholder input. Quality improvement efforts provide data-based feedback regarding progress. Participatory system dynamics modeling (PSD) triangulates stakeholder expertise, data and simulation of implementation plans prior to attempting change. Frontline staff in one VA outpatient mental health system used PSD to examine policy and procedural "mechanisms" they believe underlie local capacity to implement evidence-based psychotherapies (EBPs) for PTSD and depression. We piloted the PSD process, simulating implementation plans to improve EBP reach. Findings indicate PSD is a feasible, useful strategy for building stakeholder consensus, and may save time and effort as compared to trial-and-error EBP implementation planning.

1. West portal of Tunnel 23, contextual view to northnortheast, ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. West portal of Tunnel 23, contextual view to north-northeast, 135mm lens. Camera position is approximately centerline of original Central Pacific Transcontinental line, and bypassed Tunnel '0' (1873) (HAER CA-199) is hidden behind vegetation at center; original line was relocated to present position at right during construction of new line at left in 1909. - Central Pacific Transcontinental Railroad, Tunnel No. 23, Milepost 132.69, Applegate, Placer County, CA

1. East portal of Tunnel 4, view to west with ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. East portal of Tunnel 4, view to west with east portal of Tunnel 38 (HAER CA-211) visible in distance, 135mm lens with electronic flash fill. This tunnel was photographed to provide context, because even though somewhat enlarged, it illustrates the nature of the unlined hard rock tunnels typical of the original Central Pacific construction in 1868. - Central Pacific Transcontinental Railroad, Tunnel No. 4, Milepost 180.95, Cisco, Placer County, CA

Paster (brick and tile) 773.884; Tile Placer (brick and tile) 573.687; Tile Sorter (brick and tile) 573.887 -- Technical Report on Standardization of the General Aptitude Test Battery.

ERIC Educational Resources Information Center

Manpower Administration (DOL), Washington, DC. U.S. Training and Employment Service.

The United States Training and Employment Service General Aptitude Test Battery (GATB), first published in 1947, has been included in a continuing program of research to validate the tests against success in many different occupations. The GATB consists of 12 tests which measure nine aptitudes: General Learning Ability; Verbal Aptitude; Numerical…

8. Detail, east portal of Tunnel 41 inside Snowshed 33, ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. Detail, east portal of Tunnel 41 inside Snowshed 33, view to west-northwest, 135mm lens with electronic flash fill. The tiny white dot visible in the darkness of the tunnel is the west portal, two miles distant. The heavy steel beams carrying the concrete roof panels of the snowshed appear to be reused bridge girders. - Central Pacific Transcontinental Railroad, Tunnel No. 41, Milepost 193.3, Donner, Placer County, CA

75 FR 54805 - Approval and Promulgation of Air Quality Implementation Plans; Minnesota; Carbon Monoxide (CO...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-09

... Promulgation of Air Quality Implementation Plans; Minnesota; Carbon Monoxide (CO) Limited Maintenance Plan for... June 16, 2010, to revise the Minnesota State Implementation Plan (SIP) for carbon monoxide (CO) under the Clean Air Act (CAA). The State has submitted a limited maintenance plan for CO showing continued...

40 CFR 49.9861 - Identification of plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... TRIBAL CLEAN AIR ACT AUTHORITY Implementation Plans for Tribes-Region X Implementation Plan for the Burns Paiute Tribe of the Burns Paiute Indian Colony of Oregon § 49.9861 Identification of plan. This section and §§ 49.9862 through 49.9890 contain the implementation plan for the Burns Paiute Tribe of the Burns...

75 FR 63139 - Approval and Promulgation of Implementation Plans-Maricopa County (Phoenix) PM-10 Nonattainment...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-14

... Promulgation of Implementation Plans--Maricopa County (Phoenix) PM-10 Nonattainment Area; Serious Area Plan for... implementation plan (SIP) revisions submitted by the State of Arizona to meet, among other requirements, section... (Maricopa area). Specifically, EPA proposed to disapprove provisions of the 189(d) plan because they do not...

Design requirements for SRB production control system. Volume 4: Implementation

NASA Technical Reports Server (NTRS)

1981-01-01

The implementation plan which is presented was developed to provide the means for the successful implementation of the automated production control system. There are three factors which the implementation plan encompasses: detailed planning; phased implementation; and user involvement. The plan is detailed to the task level in terms of necessary activities as the system is developed, refined, installed, and tested. These tasks are scheduled, on a preliminary basis, over a two-and-one-half-year time frame.

40 CFR 256.42 - Recommendations for assuring facility development.

Code of Federal Regulations, 2014 CFR

2014-07-01

... WASTES GUIDELINES FOR DEVELOPMENT AND IMPLEMENTATION OF STATE SOLID WASTE MANAGEMENT PLANS Facility Planning and Implementation § 256.42 Recommendations for assuring facility development. (a) The State plan... facilities, and (4) Development of schedules of implementation. (d) The State plan should encourage private...

40 CFR 256.42 - Recommendations for assuring facility development.

Code of Federal Regulations, 2012 CFR

2012-07-01

... WASTES GUIDELINES FOR DEVELOPMENT AND IMPLEMENTATION OF STATE SOLID WASTE MANAGEMENT PLANS Facility Planning and Implementation § 256.42 Recommendations for assuring facility development. (a) The State plan... facilities, and (4) Development of schedules of implementation. (d) The State plan should encourage private...

40 CFR 256.42 - Recommendations for assuring facility development.

Code of Federal Regulations, 2013 CFR

2013-07-01

... WASTES GUIDELINES FOR DEVELOPMENT AND IMPLEMENTATION OF STATE SOLID WASTE MANAGEMENT PLANS Facility Planning and Implementation § 256.42 Recommendations for assuring facility development. (a) The State plan... facilities, and (4) Development of schedules of implementation. (d) The State plan should encourage private...

75 FR 3680 - Revisions to the California State Implementation Plan

Federal Register 2010, 2011, 2012, 2013, 2014

2010-01-22

... the California State Implementation Plan AGENCY: Environmental Protection Agency (EPA). ACTION... Pollution Control District (SJVAPCD) portion of the California State Implementation Plan (SIP). These... are taking comments on this proposal and plan to follow with a final action. DATES: Any comments must...

49 CFR 130.33 - Response plan implementation.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 2 2014-10-01 2014-10-01 false Response plan implementation. 130.33 Section 130... SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION OIL TRANSPORTATION OIL SPILL PREVENTION AND RESPONSE PLANS § 130.33 Response plan implementation. If, during transportation of oil subject to this part, a...

49 CFR 130.33 - Response plan implementation.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Response plan implementation. 130.33 Section 130... SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION OIL TRANSPORTATION OIL SPILL PREVENTION AND RESPONSE PLANS § 130.33 Response plan implementation. If, during transportation of oil subject to this part, a...

49 CFR 130.33 - Response plan implementation.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Response plan implementation. 130.33 Section 130... SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION OIL TRANSPORTATION OIL SPILL PREVENTION AND RESPONSE PLANS § 130.33 Response plan implementation. If, during transportation of oil subject to this part, a...

49 CFR 130.33 - Response plan implementation.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Response plan implementation. 130.33 Section 130... SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION OIL TRANSPORTATION OIL SPILL PREVENTION AND RESPONSE PLANS § 130.33 Response plan implementation. If, during transportation of oil subject to this part, a...

49 CFR 130.33 - Response plan implementation.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 2 2013-10-01 2013-10-01 false Response plan implementation. 130.33 Section 130... SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION OIL TRANSPORTATION OIL SPILL PREVENTION AND RESPONSE PLANS § 130.33 Response plan implementation. If, during transportation of oil subject to this part, a...

76 FR 28195 - Approval and Promulgation of Air Quality Implementation Plans; New Mexico; Sunland Park 1-Hour...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-05-16

... Promulgation of Air Quality Implementation Plans; New Mexico; Sunland Park 1-Hour Ozone Maintenance Plan AGENCY... the New Mexico State Implementation Plan (SIP). The revision consists of a maintenance plan for Sunland Park, New Mexico developed to ensure continued attainment of the 8-hour ozone National Ambient Air...

Design and Implementation of the PMS Module for ’Argos’

DTIC Science & Technology

1989-12-01

designing , and implementing a fully workable Planned Maintenance System (PMS). This implementation demonstrates both the capabilities and benefits such a...analyzing, designing , and implementing a fully workable Planned Maintenance System (PMS). This implementation demonstrates both the capabilities and... design and implementation. PMS is the system developed by the navy to provide each ship, department, and supervisor with the tools needed to plan

Implementation of Discharge Plans for Chronically Ill Elders Discharged Home.

ERIC Educational Resources Information Center

Proctor, Enola K.; And Others

1996-01-01

Addresses the extent to which discharge plans for elderly patients with congestive heart failure were implemented as planned, tested the consequences of implementation problems, and identified factors associated with implementation problems. Implications for hospital discharge planners and home health care are discussed. (KW)

Chapter L: U.S. Industrial Garnet

USGS Publications Warehouse

Evans, James G.; Moyle, Phillip R.

2006-01-01

The United States presently consumes about 16 percent of global production of industrial garnet for use in abrasive airblasting, abrasive coatings, filtration media, waterjet cutting, and grinding. As of 2005, domestic garnet production has decreased from a high of 74,000 t in 1998, and imports have increased to the extent that as much as 60 percent of the garnet used in the United States in 2003 was imported, mainly from India, China, and Australia; Canada joined the list of suppliers in 2005. The principal type of garnet used is almandite (almandine), because of its specific gravity and hardness; andradite is also extensively used, although it is not as hard or dense as almandite. Most industrial-grade garnet is obtained from gneiss, amphibolite, schist, skarn, and igneous rocks and from alluvium derived from weathering and erosion of these rocks. Garnet mines and occurrences are located in 21 States, but the only presently active (2006) mines are in northern Idaho (garnet placers; one mine), southeastern Montana (garnet placers; one mine), and eastern New York (unweathered bedrock; two mines). In Idaho, garnet is mined from Tertiary and (or) Quaternary sedimentary deposits adjacent to garnetiferous metapelites that are correlated with the Wallace Formation of the Proterozoic Belt Supergroup. In New York, garnet is mined from crystalline rocks of the Adirondack Mountains that are part of the Proterozoic Grenville province, and from the southern Taconic Range that is part of the northern Appalachian Mountains. In Montana, sources of garnet in placers include amphibolite, mica schist, and gneiss of Archean age and younger granite. Two mines that were active in the recent past in southwestern Montana produced garnet from gold dredge tailings and saprolite. In this report, we review the history of garnet mining and production and describe some garnet occurrences in most of the Eastern States along the Appalachian Mountains and in some of the Western States where industrial-grade garnet or its possible occurrence has been reported. Other natural and manmade materials compete with garnet in nearly all of the applications for which garnet can be used; garnet, however, has the advantages that it is reusable, nontoxic, and nonreactive. In addition, garnet produces much less dust than other abrasive materials, and spills are relatively benign and easy to clean up.

International strategic minerals inventory summary report; rare-earth oxides

USGS Publications Warehouse

Jackson, W.D.; Christiansen, Grey

1993-01-01

Bastnaesite, monazite, and xenotime are currently the most important rare-earth minerals. Bastnaesite occurs as a primary mineral in carbonatites. Monazite and xenotime also can be found in primary deposits but are recovered principally from heavy-mineral placers that are mined for titanium or tin. Each of these minerals has a different composition of the 15 rare-earth elements. World resources of economically exploitable rare-earth oxides (REO) are estimated at 93.4 million metric tons in place, composed of 93 percent in primary deposits and 7 percent in placers. The average mineral composition is 83 percent bastnaesite, 13 percent monazite, and 4 percent of 10 other minerals. Annual global production is about 67,000 metric tons of which 41 percent is from placers and 59 percent is from primary deposits; mining methods consist of open pits (94 percent) and dredging (6 percent). This output could be doubled if the operations that do not currently recover rare earths would do so. Resources are more than sufficient to meet the demand for the predictable future. About 52 percent of the world's REO resources are located in China. Ranking of other countries is as follows: Namibia (22 percent), the United States (15 percent), Australia (6 percent), and India (3 percent); the remainder is in several other countries. Conversely, 38 percent of the production is in China, 33 percent in the United States, 12 percent in Australia, and 5 percent each in Malaysia and India. Several other countries, including Brazil, Canada, South Africa, Sri Lanka, and Thailand, make up the remainder. Markets for rare earths are mainly in the metallurgical, magnet, ceramic, electronic, chemical, and optical industries. Rare earths improve the physical and rolling properties of iron and steel and add corrosion resistance and strength to structural members at high temperatures. Samarium and neodymium are used in lightweight, powerful magnets for electric motors. Cerium and yttrium increase the density and heat resistance of sintered ceramics. Yttrium and gadolinium contribute to the efficiency of electronic switches and sensors. Cerium improves the effectiveness of catalysts in the petroleum and automotive industries. Cerium oxides speed glass melting and are used to polish glass by chemical, rather than mechanical, means. Cerium, europium, terbium, and yttrium, as phosphoric compounds, promote the vivid colors of television screens. Consumption of rare earths is expected to grow by about 2.6 percent per year.

40 CFR 49.10042 - Approval status.

Code of Federal Regulations, 2010 CFR

2010-07-01

... TRIBAL CLEAN AIR ACT AUTHORITY Implementation Plans for Tribes-Region X Implementation Plan for the Cow... Tribal rules or measures in the implementation plan for the Reservation of the Cow Creek Band of Umpqua...

Ames Research Center FY 2000 Implementation Plan: Leading Technology into the New Millennium

NASA Technical Reports Server (NTRS)

2000-01-01

This document presents the implementation plan for Ames Research Center (ARC) within the overall framework of the NASA Strategic Plan. It describes how ARC intends to implement its Center of Excellence responsibilities, Agency assigned missions, Agency and Enterprise lead programs, and other roles in support of NASA's vision and mission. All Federal agencies are required by the 1993 Government Performance and Results Act to implement a long-term strategic planning process that includes measurable outcomes and strict accountability. At NASA, this planning process is shaped by the Space Act of 1958, annual appropriations, and other external mandates, as well as by customer requirements. The resulting Strategic Plan sets the overall architecture for what we do, identifies who our customers are, and directs where we are going and why. The Strategic Plan is the basis upon which decisions regarding program implementation and resource deployment are made. Whereas the strategic planning process examines the long-term direction of the organization and identifies a specific set of goals, the implementation planning process examines the detailed performance of the organization and allocates resources toward meeting these goals. It is the purpose of this implementation document to provide the connection between the NASA Strategic Plan and the specific programs and support functions that ARC employees perform. This connection flows from the NASA Strategic Plan, through the various Strategic Enterprise plans to the ARC Center of Excellence, primary missions, Lead Center programs, program support responsibilities, and ultimately, to the role of the individual ARC employee.

77 FR 60661 - Approval and Promulgation of Air Quality Implementation Plans; Indiana; South Bend-Elkhart...

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2012-10-04

... Promulgation of Air Quality Implementation Plans; Indiana; South Bend-Elkhart, Indiana Ozone Maintenance Plan..., Indiana 1997 8-hour ozone maintenance air quality State Implementation Plan (SIP) by replacing the... Vehicle Emissions Simulator (MOVES) 2010a emissions model. Indiana submitted this request to EPA for...

77 FR 59356 - Approval and Promulgation of Implementation Plans; North Carolina: Approval of Rocky Mount...

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2012-09-27

... Promulgation of Implementation Plans; North Carolina: Approval of Rocky Mount Supplemental Motor Vehicle... is proposing to approve a revision to the North Carolina State Implementation Plan (SIP), submitted... supplements the original redesignation request and maintenance plan for Rocky Mount 1997 8-hour ozone area...

77 FR 30212 - Approval and Promulgation of Air Quality Implementation Plans; Vermont; Regional Haze

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2012-05-22

... Promulgation of Air Quality Implementation Plans; Vermont; Regional Haze AGENCY: Environmental Protection... Implementation Plan (SIP) that addresses regional haze for the first planning period from 2008 through 2018. The... numerous sources located over a wide geographic area (also referred to as the ``regional haze program...

77 FR 47530 - Approval and Promulgation of State Implementation Plans; Hawaii; Infrastructure Requirements for...

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2012-08-09

... Promulgation of State Implementation Plans; Hawaii; Infrastructure Requirements for the 1997 8-Hour Ozone and... State Implementation Plan (SIP) revision submitted by the state of Hawaii pursuant to the requirements... FURTHER INFORMATION CONTACT: Dawn Richmond, Air Planning Office (AIR-2), U.S. Environmental Protection...

Geologic datasets for weights-of-evidence analysis in northeast Washington: 2. Mineral databases

USGS Publications Warehouse

Boleneus, D.E.

1999-01-01

Digital mineral databases are necessary to carry out weights-of-evidence modeling of mineral resources for epithermal gold and carbonate-hosted lead-zinc deposits in northeast Washington. This report describes spreadsheet tables consisting of: 1) training sites for epithermal gold, 2) placer gold sites, 3) training sites for carbonate-hosted lead-zinc, and 4) small lead-zinc mines and prospects. A fifth table provides location data about sites in the four tables.

2. West portal of Tunnel 27, contextual view from track ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. West portal of Tunnel 27, contextual view from track level east of Tunnel 26 (HAER CA-202), 210mm lens. Note solar panel providing signal power, evidence of continuing updating of technology by the railroad. Single-light searchlight-type signal was typical system-wide on the Southern Pacific prior to the 1980s merger with the Denver & Rio Grande Western. - Central Pacific Transcontinental Railroad, Tunnel No. 27, Milepost 133.9, Applegate, Placer County, CA

Late Triassic (Carnian) lamproites from Noril'sk, polar Siberia: Evidence for melting of the recycled Archean crust and the question of lamproite source for some placer diamond deposits of the Siberian Craton

NASA Astrophysics Data System (ADS)

Ivanov, Alexei V.; Demonterova, Elena I.; Savatenkov, Valery M.; Perepelov, Alexander B.; Ryabov, Viktor V.; Shevko, Artem Y.

2018-01-01

Two typical lamproitic dykes were found in Noril'sk region of the north-western Siberian Craton, which according to mineralogical, geochemical and isotopic criteria belong to anorogenic, non-diamondiferous type of lamproites. According to the geologic relationships, they cut through the Noril'sk-1 intrusion of the Siberian flood basalt province and thus are younger than 251 Ma. 40Ar/39Ar dating of the two dykes yielded ages of 235.24 ± 0.19 Ma and 233.96 ± 0.19 Ma, showing that they were emplaced in Carnian of the Late Triassic, about 16 Ma after the flood basalt event. There are some indications that there were multiple lamproitic dyke emplacements, including probably emplacement of diamondiferous lamproites, which produced Carnian-age diamond-rich placer deposits in other parts of the Siberian Craton and in adjacent regions. Lead isotope modelling shows that the source of the studied lamproites was formed with participation of recycled crust, which underwent modification of its U/Pb ratio as early as 2.5 Ga. However, the exact mechanism of the recycling cannot be deciphered now. It could be either through delamination of the cratonic crust or subduction of a mix of ancient terrigenous sediments into the mantle transition zone.

Progressive biogeochemical transformation of placer gold particles drives compositional changes in associated biofilm communities.

PubMed

Rea, Maria Angelica; Standish, Christopher D; Shuster, Jeremiah; Bissett, Andrew; Reith, Frank

2018-05-03

Biofilms on placer gold (Au)-particle surfaces drive Au solubilization and re-concentration thereby progressively transforming the particles. Gold solubilization induces Au-toxicity; however, Au-detoxifying community members ameliorates Au-toxicity by precipitating soluble Au to metallic Au. We hypothesize that Au-dissolution and re-concentration (precipitation) places selective pressures on associated microbial communities, leading to compositional changes and subsequent Au-particle transformation. We analyzed Au-particles from eight United Kingdom sites using next generation sequencing, electron microscopy and micro-analyses. Gold particles contained biofilms composed of prokaryotic cells and extracellular polymeric substances intermixed with (bio)minerals. Across all sites communities were dominated by Proteobacteria (689, 97% Operational Taxonomic Units, 59.3% of total reads), with β-Proteobacteria being the most abundant. A wide range of Au-morphotypes including nanoparticles, micro-crystals, sheet-like Au and secondary rims, indicated that dissolution and re-precipitation occurred, and from this transformation indices were calculated. Multivariate statistical analyses showed a significant relationship between the extent of Au-particle transformation and biofilm community composition, with putative metal-resistant Au-cycling taxa linked to progressive Au transformation. These included the genera Pseudomonas, Leptothrix and Acinetobacter. Additionally, putative exoelectrogenic genera Rhodoferax and Geobacter were highly abundant. In conclusion, biogeochemical Au-cycling and Au-particle transformation occurred at all sites and exerted a strong influence on biofilm community composition.

Reconnaissance investigation of the alluvial gold deposits in the North Takhar Area of Interest, Takhar Province, Afghanistan

USGS Publications Warehouse

Chirico, Peter G.; Malpeli, Katherine C.; Moran, Thomas W.

2013-01-01

This study is a reconnaissance assessment of the alluvial gold deposits of the North Takhar Area of Interest (AOI) in Takhar Province, Afghanistan. Soviet and Afghan geologists collected data and calculated the gold deposit reserves in Takhar Province in the 1970s, prior to the development of satellite-based remote-sensing platforms and new methods of geomorphic mapping. The purpose of this study was to integrate new mapping techniques with previously collected borehole sampling and concentration sampling data and geomorphologic interpretations to reassess the alluvial gold placer deposits in the North Takhar AOI. Through a combination of historical borehole and cross-section data and digital terrain modeling, the Samti, Nooraba-Khasar-Anjir, and Kocha River placer deposits were reassessed. Resource estimates were calculated to be 20,927 kilograms (kg) for Samti, 7,626 kg for Nooraba-Khasar-Anjir, 160 kg for the mouth of the Kocha, 1,047 kg for the lower Kocha, 113 kg for the middle Kocha, and 168 kg for the upper Kocha. Previous resource estimates conducted by the Soviets for the Samti and Nooraba-Khasar-Anjir deposits estimated 30,062 kg and 802 kg of gold, respectively. This difference between the new estimates and previous estimates results from the higher resolution geomorphic model and the interpretation of areas outside of the initial work zone studied by Soviet and Afghan geologists.

Dating native gold by noble gas analyses

NASA Technical Reports Server (NTRS)

Niedermann, S.; Eugster, O.; Hofmann, B.; Thalmann, CH.; Reimold, W. U.

1993-01-01

Our recent work on He, Ne, and Ar in Alpine gold samples has demonstrated that gold is extremely retentive for He and could thus, in principle, be used for U/Th-He-4 dating. For vein-type gold from Brusson, Northern Italy, we derived a U/Th-He-4 age of 36 Ma, in agreement with the K-Ar formation age of associated muscovites and biotites. However, in placer gold from the Napf area, Central Switzerland, we observed large excesses of both He-4 and radiogenic Ar-40 (Ar-40 sub rad, defined as Ar-40-295.5-Ar-.36). The gas release systematics indicate two distinct noble gas components, one of which is released below about 800 C and the other one at the melting point of gold (1064 C). We now present results of He and Xe measurements in a 1 g placer gold sample from the river Kruempelgraben, as well as He and Ar data for Brusson vein-type gold and for gold from the Lily Gold Mine, South Africa. We calculate reasonable U/Th-He-4 as well as U-Xe ages based on those gases which are released at approximately 800 C. Probably the low-temperature components represent in-situ-produced radiogenic He and fission Xe, whereas the gases evolving when gold melts have been trapped during gold formation. Therefore, only the low-temperature components are relevant for dating purposes.

Mineral resource appraisal of the Salmon National Forest, Idaho

USGS Publications Warehouse

Johnson, Rick; Close, Terry; McHugh, Ed

1998-01-01

The Salmon National Forest administers 1,776,994 net acres of mountainous terrain located in east-central Idaho. Most of the Forest is in Lemhi County; only a small portion falls within Idaho and Valley Counties. Approximately 426,114 acres of the Frank Church-River of No Return Wilderness extends into the western part of the Forest and mineral entry is severely restricted. Because of its location within the Salmon River drainage, the Forest also is subject to numerous issues surrounding restoration of anadromous fish runs. Mineral production from the Salmon National Forest began during 1866 when placer gold was discovered in Leesburg Basin. Hardrock mining quickly spread throughout the Forest and many deposits containing a wide range of commodities were discovered and developed. Although early records are sketchy, production is estimated to include 940,000 ounces gold, 654,000 ounces silver, 61.9 million pounds copper, 8.9 million pounds lead, 13.9 million pounds cobalt, 208,000 pounds zinc, and 37,000 tons fluorite mill feed. Mineral resources are large, diverse, and occur in many deposit types including exhalative, stockwork, disseminated, vein, replacement, sedimentary, skarn, breccia pipe, porphyry, and placer. The largest cobalt resource in the United States occurs in the Blackbird Mining District. Other resources include gold, silver, copper, lead, molybdenum, phosphate, manganese, iron, fluorite, uranium, thorium, rare earth oxides, and barite.

Planning Targets for Phase II Watershed Implementation Plans

EPA Pesticide Factsheets

On August 1, 2011, EPA provided planning targets for nitrogen, phosphorus and sediment for the Phase II Watershed Implementation Plans (WIPs) of the Chesapeake Bay TMDL. This page provides the letters containing those planning targets.

Building robust conservation plans.

PubMed

Visconti, Piero; Joppa, Lucas

2015-04-01

Systematic conservation planning optimizes trade-offs between biodiversity conservation and human activities by accounting for socioeconomic costs while aiming to achieve prescribed conservation objectives. However, the most cost-efficient conservation plan can be very dissimilar to any other plan achieving the set of conservation objectives. This is problematic under conditions of implementation uncertainty (e.g., if all or part of the plan becomes unattainable). We determined through simulations of parallel implementation of conservation plans and habitat loss the conditions under which optimal plans have limited chances of implementation and where implementation attempts would fail to meet objectives. We then devised a new, flexible method for identifying conservation priorities and scheduling conservation actions. This method entails generating a number of alternative plans, calculating the similarity in site composition among all plans, and selecting the plan with the highest density of neighboring plans in similarity space. We compared our method with the classic method that maximizes cost efficiency with synthetic and real data sets. When implementation was uncertain--a common reality--our method provided higher likelihood of achieving conservation targets. We found that χ, a measure of the shortfall in objectives achieved by a conservation plan if the plan could not be implemented entirely, was the main factor determining the relative performance of a flexibility enhanced approach to conservation prioritization. Our findings should help planning authorities prioritize conservation efforts in the face of uncertainty about future condition and availability of sites. © 2014 Society for Conservation Biology.

76 FR 15 - Approval and Promulgation of Implementation Plans; Texas; Emissions Banking and Trading of...

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... Promulgation of Implementation Plans; Texas; Emissions Banking and Trading of Allowances Program AGENCY... to the Texas State Implementation Plan (SIP) that create and amend the Emissions Banking and Trading... hard copy at the Air Planning Section (6PD-L), Environmental Protection Agency, 1445 Ross Avenue, Suite...

78 FR 33784 - Approval and Promulgation of Implementation Plans; Kentucky: Kentucky Portion of Cincinnati...

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2013-06-05

... Promulgation of Implementation Plans; Kentucky: Kentucky Portion of Cincinnati-Hamilton, Supplement Motor.... SUMMARY: EPA is proposing to approve a revision to the Kentucky State Implementation Plan (SIP), submitted... maintenance plan for the Kentucky portion of the Cincinnati-Hamilton, OH-KY-IN, maintenance area for the 1997...

78 FR 34903 - Approval and Promulgation of Air Quality Implementation Plans; Ohio; 1997 8-Hour Ozone...

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2013-06-11

... Promulgation of Air Quality Implementation Plans; Ohio; 1997 8-Hour Ozone Maintenance Plan Revision; Motor... request by Ohio to revise the 1997 8-hour ozone maintenance air quality State Implementation Plan (SIP) to... area with budgets developed using EPA's Motor Vehicle Emissions Simulator (MOVES) emissions model. Ohio...

78 FR 16826 - Approval and Promulgation of Air Quality Implementation Plans; Ohio; Cleveland-Akron-Lorain and...

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2013-03-19

...-9790-1] Approval and Promulgation of Air Quality Implementation Plans; Ohio; Cleveland-Akron-Lorain and Columbus 1997 8-Hour Ozone Maintenance Plan Revisions to Approved Motor Vehicle Emissions Budgets AGENCY... quality State Implementation Plans (SIPs) under the Clean Air Act to replace the previously approved motor...

78 FR 28497 - Approval and Promulgation of Air Quality Implementation Plans; Ohio; Canton-Massillon 1997 8-Hour...

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... Promulgation of Air Quality Implementation Plans; Ohio; Canton-Massillon 1997 8-Hour Ozone Maintenance Plan... the Canton-Massillon, Ohio 1997 8-hour ozone maintenance air quality State Implementation Plan (SIP... using EPA's Motor Vehicle Emissions Simulator (MOVES) emissions model. Ohio submitted the SIP revision...

78 FR 28551 - Approval and Promulgation of Air Quality Implementation Plans; Ohio; Canton-Massillon 1997 8-Hour...

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2013-05-15

... Promulgation of Air Quality Implementation Plans; Ohio; Canton-Massillon 1997 8-Hour Ozone Maintenance Plan..., Ohio, 1997 8-hour ozone maintenance air quality State Implementation Plan (SIP) under the Clean Air Act... Motor Vehicle Emissions Simulator (MOVES) emissions model. Ohio submitted the SIP revision request to...

77 FR 30214 - Approval and Promulgation of Air Quality Implementation Plans; Rhode Island; Regional Haze

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2012-05-22

... Promulgation of Air Quality Implementation Plans; Rhode Island; Regional Haze AGENCY: Environmental Protection... Implementation Plan (SIP) that addresses regional haze for the first planning period from 2008 through 2018. The... geographic area (also referred to as the ``regional haze program''). DATES: Effective Date: This rule is...

76 FR 43149 - Approval and Promulgation of Air Quality Implementation Plans; State of California; Regional Haze...

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2011-07-20

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2011-0131, FRL-9317-9] Approval and Promulgation of Air Quality Implementation Plans; State of California; Regional Haze State Implementation Plan and Interstate Transport Plan; Interference With Visibility Requirement Correction In rule document...

76 FR 57013 - Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Revised Motor...

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2011-09-15

... Promulgation of Air Quality Implementation Plans; West Virginia; Revised Motor Vehicle Emission Budgets for the... Implementation Plan (SIP) revision submitted by the State of West Virginia for the purpose of amending the 8-hour ozone maintenance plan for the Charleston, Huntington, Parkersburg, Weirton, and Wheeling 8-hour ozone...

40 CFR 109.5 - Development and implementation criteria for State, local and regional oil removal contingency plans.

Code of Federal Regulations, 2012 CFR

2012-07-01

... OIL REMOVAL CONTINGENCY PLANS § 109.5 Development and implementation criteria for State, local and regional oil removal contingency plans. Criteria for the development and implementation of State, local and... 40 Protection of Environment 23 2012-07-01 2012-07-01 false Development and implementation...

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2012-10-25

... controls are enforced through the associated SIP rules or Federal Implementation Plans (FIPs). Any purchase... Promulgation of Implementation Plans; Georgia 110(a)(1) and (2) Infrastructure Requirements for the 1997 and... Agency (EPA). ACTION: Final rule. SUMMARY: EPA is taking final action to approve the State Implementation...

Implementing corporate wellness programs: a business approach to program planning.

PubMed

Helmer, D C; Dunn, L M; Eaton, K; Macedonio, C; Lubritz, L

1995-11-01

1. Support of key decision makers is critical to the successful implementation of a corporate wellness program. Therefore, the program implementation plan must be communicated in a format and language readily understood by business people. 2. A business approach to corporate wellness program planning provides a standardized way to communicate the implementation plan. 3. A business approach incorporates the program planning components in a format that ranges from general to specific. This approach allows for flexibility and responsiveness to changes in program planning. 4. Components of the business approach are the executive summary, purpose, background, ground rules, approach, requirements, scope of work, schedule, and financials.

40 CFR 49.10050 - Federally-promulgated regulations and Federal implementation plans.

Code of Federal Regulations, 2010 CFR

2010-07-01

...-Region X Implementation Plan for the Cow Creek Band of Umpqua Indians of Oregon § 49.10050 Federally... part of the implementation plan for the Reservation of the Cow Creek Band of Umpqua Indians: (a...

Locating hidden channels for placer gold exploration in the Cariboo District, British Columbia, Canada: A case study

NASA Astrophysics Data System (ADS)

Eberle, Detlef; Bastian, Dennis; Ebel, Norbert; Schwarz, Rüdiger

2017-01-01

During the past 150 years, most of the modern day creeks were the target of miners roaming the Cariboo Mountains, British Columbia, in the search for placer gold. In these days, the probability to locate new placer gold occurrence in recent river beds is therefore substantially reduced. New, promising exploration targets appear to be channels mostly buried under alluvial cover sediments. It is airborne geophysical methods that can reveal hidden channels fast and cost-effectively as these penetrate the sub-surface contactless and reflect physical properties of the sub-surface, such as electric conductivity and magnetic susceptibility or magnetization, respectively. We applied the airborne geophysical exploration approach on four exploration areas in the Cariboo gold district. Helicopter-borne transient electromagnetic (TEM) and magnetic data were flown using the SkyTEM system. To our knowledge, it has been innovatory to apply high resolution, high density airborne geophysics in the search for placer gold deposited in pre-Holocene sedimentary channel fills of the Cariboo Mountains. A particular effort of our studies aimed at the Mary creek claims which straddle the boundary of the Quesnel and Kootenay terranes of the Canadian Cordillera and include the dormant Toop mine situated in the Mary creek area known for many finds of coarse nugget from the pre-glacial buried Toop channel. Our objective was to locate the southbound extension of the channel buried in Pleistocene sediments of the Toop plateau. Careful analysis of the airborne geophysical data sets provided indications from both the TEM and magnetic data sets favouring the existence of a hidden channel beneath the plateau. The evaluation of seven reverse circulation (RC) drill holes sunk into a promising elongated narrow conductor beneath the plateau was not conclusive as not clearly showing the sedimentary pattern of a channel with gravels typically at its bottom. Only electric conductivity-depth sections compiled from the airborne TEM and 2D direct current (DC) multi-electrode resistivity ground survey data enabled the interpretation of the airborne TEM and magnetic responses recorded over the Toop plateau. The sections suggest that the electric conductor is generated by an upwarp of a conductive layer extending at the bottom of the Pleistocene sediments. Another feature separated by ≤ 100 m from the conductor line is reflected by low electric conductivity, but is rarely prominent through its neat magnetic signature. Fine accumulations of black minerals, i.e. magnetite grains, in sediments of the area are frequently met when panning material from the creeks. We therefore interpret this low conductivity, magnetic feature as expression of a gravel lense hosting accumulations of magnetite grains and possibly indicating the southbound extension of the Toop channel beneath the plateau. Careful analysis of the airborne magnetic data set led to the result in that magnetite is not only wide-spread in present day rivers and creeks, but also in buried channels and palaeo precipitation run-off paths. Magnetic data proved to be very helpful in this project with regard of pursuing not only present day, but buried valleys and channels, in particular. Our experience made on the Mary creek claims is summarized in a straightforward exploration concept for hidden, possibly gold-bearing channels in the Cariboo gold district.

Concentrates and mantle xenocrysts from the Lao river Guinea and reconstructions of the mantle structure

NASA Astrophysics Data System (ADS)

Afanasiev, Valentin; Ashchepkov, Igor; Nikolenko, Eeugeny

2015-04-01

The discovery of the kimberlite dykes in Quinea in the basin of the Lao river means finding of the new diamondiferous kimberlite field in the West Africa. It is locating 100 km SW from Bubudu and contains large dykes and placers in Lao river. The kimberlite concentrate and diamondiferous placers are containing pyropes, chromites, Ilmenites and Cr diosides and low Cr- pyroxenes. Two river placers in Lao and Bobeko and newly discovered dyke slightly differ in compositions of minerals. mainly in representatives of the minerals though their compositional trends are in general similar. The concentrates from and Druzhba pipe (Bunudu) contains mainly ilmenite and more are pyropes. Garnets from all localities are close and belong mainly to the lherzolite field to 10 wt%Cr2O3. But the dyke contains essential amount of harzburgitic garnets starting from 2 %wt Cr2O3 and they became prevailing from 6 wt %Cr2O3. There are also megacrystic low - Cr pyropes in dyke concentrate. Dyke is rich in peridotites and coarse grained garnet pyroxenite xenoliths which are ranging from the low Cr -to Cr -diopside type Chromites from Dyke are Ti - low but are often Al rich. While chromites from Bobeko and especially Lao placers define the Cr- rich trend from 60 to 40 wt%Cr2O3 and demonstrate the deviation to ulvospinel trends with increasing of Al2O3 . Cr - Diopsides clinopyroxenites trace the Fe- Ti-Na-Al enrichment trend. Ilmenites from three localities - define close trends splitting to the two intervals 60-40 wt% TiO2 and 33-27 TiO2 which are enriched in Cr2O3 to 5wt% reflecting the crystallization of megacrystalline association at the lithosphere base and Ilm metasomatic vein stockwark near the Moho in pre-eruption feeding system. The Dyke ilmenites are Mg rich and mainly are captured from the deep part of the mantle section. Babeko and Druzhba localities are similar variations of ilmenite trends. Some ilmenites from Lao and Druzhba are Mn - rich and are less in Cr possibly reflecting the interaction protokimberlite magma with subducted material. The calculated PTXFO2 diagrams with monominreral methods (Ashchepkov et al ., 2010 -2014) the layered structure and presence of thick pyroxenite enriched lens in the middle part of mantle section which also contain harzburgite associations. He interval 4.5-5.5 GPa contains the Crromite bearing peridotites together with Ga- harburghites. Cr- low pyroxenites probablly are associated with the ilmenites while some of them are more Fe rich and reflects the de -eclogitization. The typical deformed peridotite association were not detected but heating for the garnets is found along the magma feeder traced by ilmenites. The TRE geochemistry show that most of Cr clinopyroxenes are typical for Ga- bearing peridotites with concave upward REE patterns. They are also are rich in Nb - Ba- U and extremely depleted in Zr suggesting probably the preceding depletion with the H2O rich melts . Zircon is abundant in concentrates what corresponds to large scale H2O bearing metasomatism. Garnets demonstrates semi round HREE - high patterns with MREE humper typical for pyroxenites and small LREE- enrichment. RFBR grants 05-05-64718, 03-05-64146; 11 -05-00060a 11-05-91060-PICSа

Evaluation of Weights of Evidence to Predict Epithermal-Gold Deposits in the Great Basin of the Western United States

DOE Office of Scientific and Technical Information (OSTI.GOV)

Raines, Gary L.

1999-12-15

The weights-of-evidence method provides a simple approach to the integration of diverse geologic information. The application addressed is to construct a model that predicts the locations of epithermal-gold mineral deposits in the Great Basin of the western United States. Weights of evidence is a data-driven method requiring known deposits and occurrences that are used as training sites in the evaluated area. Four hundred and fifteen known hot spring gold-silver, Comstock vein, hot spring mercury, epithermal manganese, and volcanogenic uranium deposits and occurrences in Nevada were used to define an area of 327.4 km{sup 2} as training sites to develop themore » model. The model consists of nine weighted-map patterns that are combined to produce a favorability map predicting the distribution of epithermal-gold deposits. Using a measure of the association of training sites with predictor features (or patterns), the patterns can be ranked from best to worst predictors. Based on proximity analysis, the strongest predictor is the area within 8 km of volcanic rocks younger than 43 Ma. Being close to volcanic rocks is not highly weighted, but being far from volcanic rocks causes a strong negative weight. These weights suggest that proximity to volcanic rocks define where deposits do not occur. The second best pattern is the area within 1 km of hydrothermally altered areas. The next best pattern is the area within 1 km of known placer-gold sites. The proximity analysis for gold placers weights this pattern as useful when close to known placer sites, but unimportant where placers do not exist. The remaining patterns are significantly weaker predictors. In order of decreasing correlation, they are: proximity to volcanic vents, proximity to east-west to northwest faults, elevated airborne radiometric uranium, proximity to northwest to west and north-northwest linear features, elevated aeromagnetics, and anomalous geochemistry. This ordering of the patterns is a function of the quality, applicability, and use of the data. The nine-pattern favorability map can be evaluated by comparison with the USGS National Assessment for hot spring gold-silver deposits. The Spearman's ranked correlation coefficient between the favorability and the National Assessment permissive tracts is 0.5. Tabulations of the areas of agreement and disagreement between the two maps show 74% agreement for the Great Basin. The posterior probabilities for 51 significant deposits in the Great Basin, both used and not used in the model, show the following: 26 classified as favorable; 25 classified as permissive; and 1, Florida Canyon, classified as nonpermissive.The Florida Canyon deposit has a low favorability because there are no volcanic rocks near the deposit on the Nevada geologic map used. The largest areas of disagreement are caused by the USGS National Assessment team concluding that volcanic rocks older than 27 Ma in Nevada are not permissive, which was not assumed in this model. The weights-of-evidence model is evaluated as reasonable and delineates permissive areas for epithermal deposits comparable to expert's delineation. The weights-of-evidence model has the additional characteristics that it is well defined, reproducible, objective, and provides a quantitative measure of confidence.« less

Planning for strategic change? A participative planning approach for community hospitals.

PubMed

MacDonald, S K; Beange, J E; Blachford, P C

1992-01-01

Strategic planning is becoming to hospitals what business case analysis is to private corporations. In fact, this type of planning is becoming essential for the professional management of Ontario hospitals. The participative strategic planning process at Toronto East General Hospital (TEGH) is an example of how a professionally structured and implemented strategic planning process can be successfully developed and implemented in a community hospital. In this article, the environmental factors driving planning are reviewed and the critical success factors for the development and implementation of a strategic plan are examined in the context of TEGH's experience.

78 FR 34965 - Approval and Promulgation of Air Quality Implementation Plans; Ohio; Lima 1997 8-Hour Ozone...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-11

... Promulgation of Air Quality Implementation Plans; Ohio; Lima 1997 8-Hour Ozone Maintenance Plan Revision; Motor... 1997 8-hour ozone maintenance air quality State Implementation Plan (SIP) to replace the previously... Simulator (MOVES) emissions model. Ohio submitted the SIP revision request to EPA on January 11, 2013. DATES...

78 FR 34965 - Approval and Promulgation of Air Quality Implementation Plans; Ohio; 1997 8-Hour Ozone...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-11

... Promulgation of Air Quality Implementation Plans; Ohio; 1997 8-Hour Ozone Maintenance Plan Revision; Motor... request by Ohio to revise the 1997 8-hour ozone maintenance air quality State Implementation Plan (SIP...) emissions model. Ohio submitted the SIP revision request to EPA on December 7, 2012. DATES: Comments must be...

78 FR 34906 - Approval and Promulgation of Air Quality Implementation Plans; Ohio; Lima 1997 8-Hour Ozone...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-11

... Promulgation of Air Quality Implementation Plans; Ohio; Lima 1997 8-Hour Ozone Maintenance Plan Revision to... Lima, Ohio 1997 8-hour ozone maintenance air quality State Implementation Plan (SIP) to replace motor... (MOVES) emissions model. Ohio submitted the SIP revision request to EPA on January 11, 2013. DATES: This...

Factors affecting strategic plan implementation using interpretive structural modeling (ISM).

PubMed

Bahadori, Mohammadkarim; Teymourzadeh, Ehsan; Tajik, Hamidreza; Ravangard, Ramin; Raadabadi, Mehdi; Hosseini, Seyed Mojtaba

2018-06-11

Purpose Strategic planning is the best tool for managers seeking an informed presence and participation in the market without surrendering to changes. Strategic planning enables managers to achieve their organizational goals and objectives. Hospital goals, such as improving service quality and increasing patient satisfaction cannot be achieved if agreed strategies are not implemented. The purpose of this paper is to investigate the factors affecting strategic plan implementation in one teaching hospital using interpretive structural modeling (ISM). Design/methodology/approach The authors used a descriptive study involving experts and senior managers; 16 were selected as the study sample using a purposive sampling method. Data were collected using a questionnaire designed and prepared based on previous studies. Data were analyzed using ISM. Findings Five main factors affected strategic plan implementation. Although all five variables and factors are top level, "senior manager awareness and participation in the strategic planning process" and "creating and maintaining team participation in the strategic planning process" had maximum drive power. "Organizational structure effects on the strategic planning process" and "Organizational culture effects on the strategic planning process" had maximum dependence power. Practical implications Identifying factors affecting strategic plan implementation is a basis for healthcare quality improvement by analyzing the relationship among factors and overcoming the barriers. Originality/value The authors used ISM to analyze the relationship between factors affecting strategic plan implementation.

Measuring the Implementation Fidelity of Student Affairs Programs: A Critical Component of the Outcomes Assessment Cycle

ERIC Educational Resources Information Center

Gerstner, Jerusha J.; Finney, Sara J.

2013-01-01

Implementation fidelity assessment provides a means of measuring the alignment between the planned program and the implemented program. Unfortunately, the implemented program can differ from the planned program, resulting in ambiguous inferences about the planned program's effectiveness (i.e., it is uncertain if poor results are due to an…

75 FR 10449 - Approval and Promulgation of Implementation Plans; Texas; Revisions to Chapter 116 Which Relate...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-03-08

... Promulgation of Implementation Plans; Texas; Revisions to Chapter 116 Which Relate to the Application Review... approve revisions to the Texas State Implementation Plan (SIP) submitted by the State of Texas to EPA on... implements the requirements of House Bill 3732, 80th Legislature (2007), and the Texas Health and Safety Code...

Arsenic and mercury contamination related to historical goldmining in the Sierra Nevada, California

USGS Publications Warehouse

Alpers, Charles N.

2017-01-01

Arsenic (As) is a naturally occurring constituent in low-sulphide gold-quartz vein deposits, the dominant deposit type for lode mines in the Sierra Nevada Foothills (SNFH) gold (Au) province of California. Concentrations of naturally occurring mercury (Hg) in the SNFH Au province are low, but extensive use and loss of elemental Hg during amalgamation processing of ore from lode and placer Au deposits led to widespread contamination of Hg in the Sierra Nevada foothills and downstream areas, such as the Sacramento–San Joaquin Delta and San Francisco Bay. This review paper provides an overview of As and Hg contamination related to historical Au mining in the Sierra Nevada of California. It summarizes the geology, mineralogy, and geochemistry of the Au deposits, and provides information on specific areas where detailed studies have been done in association with past, ongoing, and planned remediation activities related to the environmental As and Hg contamination.Arsenic is a naturally occurring constituent in low-sulphide Au-quartz vein deposits, the dominant deposit type for lode mines in the Sierra Nevada Foothills (SNFH) Au province (Ashley 2002). Because of elevated concentrations of As in accessory iron-sulphide minerals including arsenopyrite (FeAsS) and arsenian pyrite (Fe(S,As)2), As is commonly a contaminant of concern in lode Au mine waste, including waste rock and mill tailings. The principal pathways of human As exposure from mine waste include ingestion of soil or drinking water, and inhalation of dust in contaminated areas (Mitchell 2014).Concentrations of naturally occurring Hg in the SNFH Au province are low, but extensive use and loss of elemental Hg during amalgamation processing of ore from lode and placer Au deposits (Churchill 2000) led to widespread contamination of Hg in the Sierra Nevada foothills and downstream areas, such as the Sacramento–San Joaquin Delta and San Francisco Bay (Alpers et al. 2005a). Conversion of Hg to monomethylmercury (MeHg) by sulphate-reducing and iron-reducing microbes facilitates its bioaccumulation (Wiener et al. 2003). The human Hg exposure pathway of main concern is ingestion of MeHg from sport (non-commercial) fish, especially higher trophic levels such as bass species (Davis et al. 2008). Wildlife exposure to MeHg is also a concern because of chronic and reproductive effects, for example in fish-eating and invertebrate-foraging birds (e.g. Wiener et al. 2003; Eagles-Smith et al. 2009; Ackerman et al. 2016).

24 CFR 598.605 - Implementation plan.

Code of Federal Regulations, 2010 CFR

2010-04-01

... URBAN DEVELOPMENT COMMUNITY FACILITIES URBAN EMPOWERMENT ZONES: ROUND TWO AND THREE DESIGNATIONS Empowerment Zone Grants § 598.605 Implementation plan. (a) Implementation plan content. An EZ must submit an... requirements that the state and local governments, as Empowerment Zone designees, have agreed to meet as...

Prehistory and History of the Upper Gila River, Arizona and New Mexico: An Archaeological Overview.

DTIC Science & Technology

1984-02-01

Sharon Debowski directed the survey of the north side of the river, again covering the maximum flood pool and a half-mile (0.8 km.) buffer zone. In...resistance. By 1865, placer deposits were being worked along the San Francisco River; in 1869 Lt. John Bourke was one of several persons to note rich...Papers of the Peabody Museum of American Archaeology and Ethnology 44(1). Harvard University, Cambridge, Mass. Debowski, Sharon S., and Gordon Fritz

Placers of cosmic dust in the blue ice lakes of Greenland

NASA Technical Reports Server (NTRS)

Maurette, M.; Hammer, C.; Reeh, N.; Brownlee, D. E.; Thomsen, H. H.

1986-01-01

A concentration process occurring in the melt zone of the Greenland ice cap has produced the richest known deposit of cosmic dust on the surface of the earth. Extraterrestrial particles collected from this region are well preserved and are collectable in large quantities. The collected particles are generally identical to cosmic spheres found on the ocean floor, but a pure glass type was discovered that has not been seen in deep-sea samples. Iron-rich spheres are conspicuously rare in the collected material.

An assessment of implementation and evaluation phases of strategic plans in Iranian hospitals.

PubMed

Sadeghifar, Jamil; Tofighi, Shahram; Roshani, Mohamad; Toulideh, Zahra; Mohsenpour, Seyedramezan; Jafari, Mehdi

2017-01-01

To assess the implementation and evaluation phases of strategic plans in selected hospitals. We conducted a cross-sectional study of implementation and evaluation of strategic plan in 24 hospitals in 2015, using a questionnaire which consisted of two separate sections for strategic implementation and strategic evaluation. Data were analyzed with SPSS version 18. Nearly one-third of hospitals claimed that they allocate their budget based on priorities and strategic goals. However, it turned out that although goals had been set, no formal announcements had been made. Most of the hospitals stated that they used measures when evaluating the plan. For hospital staff, clarifying the hospital's priorities was the most important advantage of a strategic plan. There is no clear definition for strategic management in Iranian hospitals, which results in chaotic implementation and control of strategic planning.

The Best Laid Plans: An Examination of School Plan Quality and Implementation in a School Improvement Initiative

ERIC Educational Resources Information Center

Strunk, Katharine O.; Marsh, Julie A.; Bush-Mecenas, Susan C.; Duque, Matthew R.

2016-01-01

Purpose: A common strategy used in school improvement efforts is a mandated process of formal planning, yet little is known about the quality of plans or the relationship between plan quality and implementation. This mixed-methods article investigates plan quality, factors associated with plan quality, and the relationship between plan quality and…

Sample-Based Motion Planning in High-Dimensional and Differentially-Constrained Systems

DTIC Science & Technology

2010-02-01

Reachable Set . . . 88 6-1 LittleDog Robot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 6-2 Dog bounding up stairs ...planning algorithm implemented on LittleDog, a quadruped robot . The motion planning algorithm successfully planned bounding trajectories over extremely...a motion planning algorithm implemented on LittleDog, a quadruped robot . The motion planning algorithm successfully planned bounding trajectories

Strategic planning, implementation, and evaluation processes in hospital systems: a survey from Iran.

PubMed

Sadeghifar, Jamil; Jafari, Mehdi; Tofighi, Shahram; Ravaghi, Hamid; Maleki, Mohammad Reza

2014-09-28

Strategic planning has been presented as an important management practice. However, evidence of its deployment in healthcare systems in low-income and middle-income countries (LMICs) is limited. This study investigated the strategic management process in Iranian hospitals. The present study was accomplished in 24 teaching hospitals in Tehran, Iran from September 2012 to March 2013. The data collection instrument was a questionnaire including 130 items. This questionnaire measured the situation of formulation, implementation, and evaluation of strategic plan as well as the requirements, facilitators, and its benefits in the studied hospitals. All the investigated hospitals had a strategic plan. The obtained percentages for the items "the rate of the compliance to requirements" and "the quantity of planning facilitators" (68.75%), attention to the stakeholder participation in the planning (55.74%), attention to the planning components (62.22%), the status of evaluating strategic plan (59.94%) and the benefits of strategic planning for hospitals (65.15%) were in the medium limit. However, the status of implementation of the strategic plan (53.71%) was found to be weak. Significant statistical correlations were observed between the incentive for developing strategic plan and status of evaluating phase (P=0.04), and between status of implementation phase and having a documented strategic plan (P=0.03). According to the results, it seems that absence of appropriate internal incentive for formulating and implementing strategies led more hospitals to start formulation strategic planning in accordance with the legal requirements of Ministry of Health. Consequently, even though all the investigated hospital had the documented strategic plan, the plan has not been implemented efficiently and valid evaluation of results is yet to be achieved.

Strategic Planning, Implementation, and Evaluation Processes in Hospital Systems: A Survey From Iran

PubMed Central

Sadeghifar, Jamil; Jafari, Mehdi; Tofighi, Shahram; Ravaghi, Hamid; Maleki, Mohammad Reza

2015-01-01

Aim & Background: Strategic planning has been presented as an important management practice. However, evidence of its deployment in healthcare systems in low-income and middle-income countries (LMICs) is limited. This study investigated the strategic management process in Iranian hospitals. Methods: The present study was accomplished in 24 teaching hospitals in Tehran, Iran from September 2012 to March 2013. The data collection instrument was a questionnaire including 130 items. This questionnaire measured the situation of formulation, implementation, and evaluation of strategic plan as well as the requirements, facilitators, and its benefits in the studied hospitals. Results: All the investigated hospitals had a strategic plan. The obtained percentages for the items “the rate of the compliance to requirements” and “the quantity of planning facilitators” (68.75%), attention to the stakeholder participation in the planning (55.74%), attention to the planning components (62.22%), the status of evaluating strategic plan (59.94%) and the benefits of strategic planning for hospitals (65.15%) were in the medium limit. However, the status of implementation of the strategic plan (53.71%) was found to be weak. Significant statistical correlations were observed between the incentive for developing strategic plan and status of evaluating phase (P=0.04), and between status of implementation phase and having a documented strategic plan (P=0.03). Conclusion: According to the results, it seems that absence of appropriate internal incentive for formulating and implementing strategies led more hospitals to start formulation strategic planning in accordance with the legal requirements of Ministry of Health. Consequently, even though all the investigated hospital had the documented strategic plan, the plan has not been implemented efficiently and valid evaluation of results is yet to be achieved. PMID:25716385

75 FR 61369 - Revisions to the California State Implementation Plan; Sacramento Metropolitan Air Quality...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-05

... the California State Implementation Plan; Sacramento Metropolitan Air Quality Management District... approve a revision to the Sacramento Metropolitan Air Quality Management District's portion of the... Metropolitan Air Quality Management District (SMAQMD) adopted the ``Ozone State Implementation Plan Revision...

76 FR 48006 - Limited Federal Implementation Plan; Prevention of Significant Deterioration; California; North...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-08

... Implementation Plan; Prevention of Significant Deterioration; California; North Coast Unified Air Quality Management District AGENCY: Environmental Protection Agency (EPA). ACTION: Final rule. SUMMARY: EPA is finalizing a limited Federal Implementation Plan (FIP) for the North Coast Unified Air Quality Management...

76 FR 34630 - Approval and Promulgation of Implementation Plans; New Hampshire: Prevention of Significant...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-14

... Promulgation of Implementation Plans; New Hampshire: Prevention of Significant Deterioration; Greenhouse Gas... greenhouse gas (GHG) emissions. This rule clarifies the applicable thresholds in the New Hampshire SIP... Significant Deterioration Provisions Concerning Greenhouse Gas Emitting-Sources in State Implementation Plans...

75 FR 2090 - Approval and Promulgation of Air Quality Implementation Plans; Indiana; Volatile Organic Compound...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-01-14

... Promulgation of Air Quality Implementation Plans; Indiana; Volatile Organic Compound Automobile Refinishing... automobile refinishing rule for approval into its State Implementation Plan (SIP). These rule revisions extend the applicability of Indiana's approved volatile organic compound (VOC) automobile refinishing...

Climate Action Planning Process | Climate Neutral Research Campuses | NREL

Science.gov Websites

Action Planning Process Climate Action Planning Process For research campuses, NREL has developed a five-step process to develop and implement climate action plans: Determine baseline energy consumption Analyze technology options Prepare a plan and set priorities Implement the climate action plan Measure and

Some Methods for Evaluating Program Implementation.

ERIC Educational Resources Information Center

Hardy, Roy A.

An approach to evaluating program implementation is described. This approach includes the development of a project description which includes a structure matrix, sampling from the structure matrix, and preparing an implementation evaluation plan. The implementation evaluation plan should include: (1) verification of implementation of planned…

78 FR 16825 - Approval of Air Quality Implementation Plans; Navajo Nation; Regional Haze Requirements for...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-19

... Quality Implementation Plans; Navajo Nation; Regional Haze Requirements for Navajo Generating Station... source-specific federal implementation plan (FIP) requiring the Navajo Generating Station (NGS), located... . SUPPLEMENTARY INFORMATION: Throughout this document, ``we'', ``us'', and ``our'' refer to EPA. Table of Contents...

33 CFR 385.30 - Master Implementation Sequencing Plan.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 3 2014-07-01 2014-07-01 false Master Implementation Sequencing... Incorporating New Information Into the Plan § 385.30 Master Implementation Sequencing Plan. (a) Not later than... of Environmental Protection, and other Federal, State, and local agencies, develop a Master...

33 CFR 385.30 - Master Implementation Sequencing Plan.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Master Implementation Sequencing... Incorporating New Information Into the Plan § 385.30 Master Implementation Sequencing Plan. (a) Not later than... of Environmental Protection, and other Federal, State, and local agencies, develop a Master...

33 CFR 385.30 - Master Implementation Sequencing Plan.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 3 2012-07-01 2012-07-01 false Master Implementation Sequencing... Incorporating New Information Into the Plan § 385.30 Master Implementation Sequencing Plan. (a) Not later than... of Environmental Protection, and other Federal, State, and local agencies, develop a Master...

78 FR 52485 - Revisions to the Arizona State Implementation Plan, Maricopa County Area

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-23

...] Revisions to the Arizona State Implementation Plan, Maricopa County Area AGENCY: Environmental Protection... County Area portion of the Arizona State Implementation Plan (SIP). These revisions concern particulate matter (PM) emissions from fugitive dust sources. We are approving local statutes that regulate these...

78 FR 63383 - Approval and Promulgation of Air Quality Implementation Plans; Rhode Island: Prevention of...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-10-24

...] Approval and Promulgation of Air Quality Implementation Plans; Rhode Island: Prevention of Significant... revisions to the Rhode Island State Implementation Plan (SIP) primarily relating to regulation of Greenhouse Gases (GHGs) under Rhode Island's Prevention of Significant Deterioration (PSD) preconstruction...

76 FR 4835 - Approval and Promulgation of Air Quality Implementation Plans; Ohio; Volatile Organic Compound...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-27

... Promulgation of Air Quality Implementation Plans; Ohio; Volatile Organic Compound Reinforced Plastics...) emissions from reinforced plastic composites production operations to Ohio's State Implementation plan (SIP). This rule applies to any facility that has reinforced plastic composites production operations. This...

75 FR 24404 - Approval and Promulgation of Air Quality Implementation Plans; Indiana; Volatile Organic Compound...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-05

... Promulgation of Air Quality Implementation Plans; Indiana; Volatile Organic Compound Automobile Refinishing... approving into the Indiana State Implementation Plan (SIP) amendments to Indiana's automobile refinishing... (VOC) automobile refinishing rules to all persons in Indiana who sell or manufacture automobile...

77 FR 24160 - Revisions to the Hawaii State Implementation Plan

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-23

... the Hawaii State Implementation Plan AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: EPA is proposing to approve revisions to the Hawaii State Implementation Plan (SIP... Hawaii SIP in 1983. DATES: Any comments on this proposal must arrive by May 23, 2012. ADDRESSES: Submit...

76 FR 5203 - Draft Environmental Impact Statement, Stehekin River Corridor Implementation Plan, North Cascades...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-28

... Statement, Stehekin River Corridor Implementation Plan, North Cascades National Park Service Complex; Chelan... public comment period. SUMMARY: The National Park Service, in cooperation with the Federal Highway Administration, has prepared a combined Stehekin River Corridor Implementation Plan, Lake Chelan National...

75 FR 34669 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Transportation...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-18

... Promulgation of Air Quality Implementation Plans; Maryland; Transportation Conformity Regulations AGENCY... Implementation Plan (SIP) revision submitted by Maryland for Transportation Conformity Regulations. In the Final Rules section of this Federal Register, EPA is approving the State's SIP submittal as a direct final...

76 FR 59344 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Transportation...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-26

... Promulgation of Air Quality Implementation Plans; Maryland; Transportation Conformity Regulations AGENCY... Implementation Plan (SIP) revision submitted by Maryland to establish transportation conformity regulations. In the Final Rules section of this Federal Register, EPA is approving the State's SIP submittal as a...

40 CFR 93.120 - Consequences of control strategy implementation plan failures.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Consequences of control strategy implementation plan failures. 93.120 Section 93.120 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Consequences of control strategy implementation plan failures. (a) Disapprovals. (1) If EPA disapproves any...

76 FR 53369 - Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Adhesives and...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-26

... Promulgation of Air Quality Implementation Plans; Pennsylvania; Adhesives and Sealants Rule AGENCY... Implementation Plan (SIP) revision submitted by the Commonwealth of Pennsylvania. The SIP revision pertains to... volatile organic compounds (VOC) from the manufacture, sale, use, or application of adhesives, sealants...

An assessment of implementation and evaluation phases of strategic plans in Iranian hospitals

PubMed Central

Sadeghifar, Jamil; Tofighi, Shahram; Roshani, Mohamad; Toulideh, Zahra; Mohsenpour, Seyedramezan; Jafari, Mehdi

2017-01-01

Objectives: To assess the implementation and evaluation phases of strategic plans in selected hospitals. Methods: We conducted a cross-sectional study of implementation and evaluation of strategic plan in 24 hospitals in 2015, using a questionnaire which consisted of two separate sections for strategic implementation and strategic evaluation. Data were analyzed with SPSS version 18. Results: Nearly one-third of hospitals claimed that they allocate their budget based on priorities and strategic goals. However, it turned out that although goals had been set, no formal announcements had been made. Most of the hospitals stated that they used measures when evaluating the plan. For hospital staff, clarifying the hospital’s priorities was the most important advantage of a strategic plan. Conclusion: There is no clear definition for strategic management in Iranian hospitals, which results in chaotic implementation and control of strategic planning. PMID:29085637

40 CFR 49.148-49.150 - [Reserved

Code of Federal Regulations, 2013 CFR

2013-07-01

... INDIAN COUNTRY: AIR QUALITY PLANNING AND MANAGEMENT General Federal Implementation Plan Provisions Federal Implementation Plan for Oil and Natural Gas Production Facilities, Fort Berthold Indian...

40 CFR 49.148-49.150 - [Reserved

Code of Federal Regulations, 2014 CFR

2014-07-01

... INDIAN COUNTRY: AIR QUALITY PLANNING AND MANAGEMENT General Federal Implementation Plan Provisions Federal Implementation Plan for Oil and Natural Gas Production Facilities, Fort Berthold Indian...

40 CFR 52.2673 - Original identification of plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 40 Protection of Environment 4 2010-07-01 2010-07-01 false Original identification of plan. 52... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Guam § 52.2673 Original identification of plan. (a) This section identified the original “Implementation Plan for Compliance With the...

40 CFR 52.2823 - Original identification of plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 40 Protection of Environment 4 2010-07-01 2010-07-01 false Original identification of plan. 52... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) American Samoa § 52.2823 Original identification of plan. (a) This section identified the original “Implementation Plan for Compliance With the...

A Model for Implementing a Career Education System.

ERIC Educational Resources Information Center

Ryan, T. Antoinette

The model for career education implementation defines three major functions which constitute the essential elements in the implementation process: planning, implementation, and evaluation. Emphasis is placed on the interrelatedness of implementation to both planning and evaluation of career education. The 11 subsystems involved in implementing…

Making Strategic Planning Work: Experiences from a Private University. AIR 1986 Annual Forum Paper.

ERIC Educational Resources Information Center

Chan, Susy S.

Issues in implementating strategic planning in higher education management are considered, along with successful strategies and problem areas in implementing an integrated planning and budgeting process at DePaul University, a comprehensive Catholic university. Key implementation issues are as follows: (1) maintaining an organizational balance…

77 FR 24399 - Approval and Promulgation of Implementation Plans; Georgia; Atlanta; Ozone 2002 Base Year...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-24

... Promulgation of Implementation Plans; Georgia; Atlanta; Ozone 2002 Base Year Emissions Inventory AGENCY... approve the ozone 2002 base year emissions inventory, portion of the state implementation plan (SIP... Atlanta, Georgia (hereafter referred to as ``the Atlanta Area'' or ``Area''), ozone attainment...

75 FR 39365 - Revisions to the California State Implementation Plan, Imperial County Air Pollution Control...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-07-08

... Implementation Plan, Imperial County Air Pollution Control District; Final Rule #0;#0;Federal Register / Vol. 75... Implementation Plan, Imperial County Air Pollution Control District AGENCY: Environmental Protection Agency (EPA... the Imperial County Air Pollution Control District (ICAPCD or the District) portion of the California...

75 FR 72963 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Control of Volatile...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-29

... Promulgation of Air Quality Implementation Plans; Maryland; Control of Volatile Organic Compound Emissions From Industrial Solvent Cleaning Operations; Withdrawal of Direct Final Rule AGENCY: Environmental Protection... withdrawing the direct final rule to approve revisions to Maryland's State Implementation Plan (SIP). This SIP...

75 FR 25775 - Disapproval of State Implementation Plan Revisions, South Coast Air Quality Management District

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-10

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2009-0573; FRL-9146-5] Disapproval of State Implementation Plan Revisions, South Coast Air Quality Management District AGENCY: Environmental... South Coast Air Quality Management District (SCAQMD) portion of the California State Implementation Plan...

76 FR 55621 - Revisions to the California State Implementation Plan, Yolo-Solano Air Quality Management District

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-08

... California State Implementation Plan, Yolo- Solano Air Quality Management District AGENCY: Environmental...-Solano Air Quality Management District portion of the California State Implementation Plan (SIP). This... the following local rule: Yolo-Solano Air Quality Management District Rule 2.41, Expandable...

76 FR 47094 - Revisions to the California State Implementation Plan; South Coast Air Quality Management District

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-04

... the California State Implementation Plan; South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District portion of the California State Implementation Plan... following local rule: South Coast Air Quality Management District Rule 1175, Control of Emissions from the...

77 FR 52277 - Approval of Air Quality Implementation Plans; California; South Coast Air Quality Management...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-08-29

... Quality Implementation Plans; California; South Coast Air Quality Management District; Prevention of... rule. SUMMARY: EPA is proposing approval of a permitting rule submitted for the South Coast Air Quality Management District (District) portion of the California State Implementation Plan (SIP). The State is...

76 FR 72142 - Revisions to the California State Implementation Plan, South Coast Air Quality Management District

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-22

... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District portion of the California State Implementation Plan... Office of Management and Budget under Executive Order 12866 (58 FR 51735, October 4, 1993); Does not...

75 FR 43114 - Approval and Promulgation of Air Quality Implementation Plans; Texas; Revisions to Emissions...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-07-23

... Promulgation of Air Quality Implementation Plans; Texas; Revisions to Emissions Inventory Reporting... Consistent With the Cross Media Electronic Reporting Rule AGENCY: Environmental Protection Agency (EPA... revisions to the Texas State Implementation Plan (SIP) submitted by the Governor of Texas and by the Texas...

76 FR 4597 - Approval and Promulgation of Air Quality Implementation Plans; Kentucky; Disapproval of...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-26

... intention to complete a rule to address interstate pollution transport in the eastern half of the... and Promulgation of Air Quality Implementation Plans; Kentucky; Disapproval of Interstate Transport... Kentucky's State implementation plan (SIP) meets the interstate transport requirements with regard to the...

78 FR 22785 - Approval and Promulgation of Air Quality Implementation Plans; Delaware, State Board Requirements

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-17

... Promulgation of Air Quality Implementation Plans; Delaware, State Board Requirements AGENCY: Environmental... revision to the Delaware State Implementation Plan (SIP) submitted by the Delaware Department of Natural Resources and Environmental Control (DNREC) on January 11, 2013. The SIP revision addresses requirements of...

77 FR 36442 - Approval and Promulgation of Air Quality Implementation Plans; Michigan; PSD Regulations

Federal Register 2010, 2011, 2012, 2013, 2014

2012-06-19

... Promulgation of Air Quality Implementation Plans; Michigan; PSD Regulations AGENCY: Environmental Protection... Significant Deterioration (PSD) construction permit program of State of Michigan's State Implementation Plan (SIP) to meet the Clean Air Act (CAA) requirements for PSD in Class I Areas attaining the National...

75 FR 69909 - Approval and Promulgation of Implementation Plans; Texas; Emissions Banking and Trading of...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-16

... Promulgation of Implementation Plans; Texas; Emissions Banking and Trading of Allowances Program AGENCY... four revisions to the Texas State Implementation Plan (SIP) that create and amend the Emissions Banking... reached via electronic mail at [email protected] . SUPPLEMENTARY INFORMATION: In the final rules section...

76 FR 508 - Approval and Promulgation of Implementation Plans; Idaho

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-05

... Promulgation of Implementation Plans; Idaho AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: EPA is proposing to approve revisions to the Idaho State Implementation Plan (SIP) that were submitted to EPA by the State of Idaho on April 16, 2007. This SIP submittal includes new and...

77 FR 18990 - Approval and Promulgation of Implementation Plans; New Mexico; Construction Permit Fees

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-29

... reviewing and acting on specific air quality construction permit applications received by the New Mexico... Promulgation of Implementation Plans; New Mexico; Construction Permit Fees AGENCY: Environmental Protection... replace existing rules, and revisions to the applicable State Implementation Plan (SIP) for New Mexico...

75 FR 20942 - Approval and Promulgation of Air Quality Implementation Plans; New Mexico; Transportation...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-22

... Promulgation of Air Quality Implementation Plans; New Mexico; Transportation Conformity Requirement for... proposing to approve a revision to the New Mexico State Implementation Plan (SIP) at New Mexico Administrative Code 20.11.3, concerning transportation conformity rules for Bernalillo County, New Mexico. The...

75 FR 59180 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Control Technique...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-27

... Promulgation of Air Quality Implementation Plans; Maryland; Control Technique Guidelines for Paper, Film, and... Technique Guidelines (CTG) for paper, film, and foil coatings. These amendments will reduce volatile organic... Promulgation of Air Quality Implementation Plans; Maryland; Control Technique Guidelines for Paper, Film, and...

77 FR 66945 - Approval and Promulgation of Air Quality Implementation Plans; New Hampshire; Reasonably...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-11-08

... and Promulgation of Air Quality Implementation Plans; New Hampshire; Reasonably Available Control... Implementation Plan (SIP) revision submitted by the State of New Hampshire. The revision establishes Reasonably... intended effect of this action is to approve these requirements into the New Hampshire SIP. This action is...

12 CFR 1291.3 - AHP Implementation Plan.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 12 Banks and Banking 7 2010-01-01 2010-01-01 false AHP Implementation Plan. 1291.3 Section 1291.3 Banks and Banking FEDERAL HOUSING FINANCE AGENCY HOUSING GOALS AND MISSION FEDERAL HOME LOAN BANKS... AHP Implementation Plan without first consulting its Advisory Council. The Bank's board of directors...

40 CFR 49.9862 - Approval status.

Code of Federal Regulations, 2010 CFR

2010-07-01

... TRIBAL CLEAN AIR ACT AUTHORITY Implementation Plans for Tribes-Region X Implementation Plan for the Burns Paiute Tribe of the Burns Paiute Indian Colony of Oregon § 49.9862 Approval status. There are currently no EPA-approved Tribal rules or measures in the implementation plan for the Reservation of the Burns...

76 FR 68103 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-03

... the California State Implementation Plan, San Joaquin Valley Unified Air Pollution Control District... revisions to the San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) portion of the... State Implementation Plan, San Joaquin Valley Unified Air Pollution Control District Rule 4692...

40 CFR 49.9986 - Contents of implementation plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... for emissions detrimental to public health or welfare. (i) Section 49.137Rule for air pollution episodes. (j) Section 49.138Rule for the registration of air pollution sources and the reporting of... ASSISTANCE TRIBAL CLEAN AIR ACT AUTHORITY Implementation Plans for Tribes-Region X Implementation Plan for...

40 CFR 49.9956 - Contents of implementation plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... detrimental to public health or welfare. (k) Section 49.137Rule for air pollution episodes. (l) Section 49.138Rule for the registration of air pollution sources and the reporting of emissions. (m) Section 49... ASSISTANCE TRIBAL CLEAN AIR ACT AUTHORITY Implementation Plans for Tribes-Region X Implementation Plan for...

40 CFR 49.9926 - Contents of implementation plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... open burning. (h) Section 49.135Rule for emissions detrimental to public health or welfare. (i) Section 49.137Rule for air pollution episodes. (j) Section 49.138Rule for the registration of air pollution... ASSISTANCE TRIBAL CLEAN AIR ACT AUTHORITY Implementation Plans for Tribes-Region X Implementation Plan for...

40 CFR 49.9896 - Contents of implementation plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... open burning. (h) Section 49.135Rule for emissions detrimental to public health or welfare. (i) Section 49.137Rule for air pollution episodes. (j) Section 49.138Rule for the registration of air pollution... ASSISTANCE TRIBAL CLEAN AIR ACT AUTHORITY Implementation Plans for Tribes-Region X Implementation Plan for...

78 FR 63878 - Approval and Promulgation of Air Quality Implementation Plans; Virginia; Revised Ambient Air...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-10-25

...] Approval and Promulgation of Air Quality Implementation Plans; Virginia; Revised Ambient Air Quality... State Implementation Plan (SIP). The revisions add ambient air quality standards and associated... Ambient Air Quality Standards (NAAQS) for PM 2.5 . EPA is approving these revisions in accordance with the...

78 FR 30829 - Approval and Promulgation of Air Quality Implementation Plans; Illinois; Air Quality Standards...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-23

... Promulgation of Air Quality Implementation Plans; Illinois; Air Quality Standards Revision AGENCY... the Illinois State Implementation Plan (SIP) to reflect current national ambient air quality standards...) 692-2450. 4. Mail: Pamela Blakley, Chief, Control Strategies Section, Air Programs Branch (AR-18J), U...

77 FR 73320 - Approval of Air Quality Implementation Plans; California; South Coast Air Quality Management...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-12-10

... Quality Implementation Plans; California; South Coast Air Quality Management District; Prevention of... Implementation Plan (SIP) revision for the South Coast Air Quality Management District (SCAQMD or District... in a August 15, 2012 letter from the South Coast Air Quality Management District regarding specific...

75 FR 19886 - Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Revisions to the Wyoming...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-16

... Promulgation of Air Quality Implementation Plans; Wyoming; Revisions to the Wyoming Air Quality Standards and.... Wyoming has revised its Air Quality Standards and Regulations, specifically Chapter 1, Section 5... Wyoming's State Implementation Plan (SIP). These revisions amend Wyoming's Air Quality Standards and...

78 FR 50369 - Approval and Promulgation of Air Quality Implementation Plans; Michigan

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-19

...] Approval and Promulgation of Air Quality Implementation Plans; Michigan AGENCY: Environmental Protection... the State of Michigan's Clean Air Act State Implementation Plan (SIP) that Michigan had submitted on March 24, 2009. Michigan's submittal included revisions to Part 1, Definitions; Part 2, Air Use Approval...

78 FR 23524 - Approval and Promulgation of Air Quality Implementation Plans; Indiana; Particulate Matter...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-19

... Promulgation of Air Quality Implementation Plans; Indiana; Particulate Matter Ambient Air Quality Standards... revise the Indiana State Implementation Plan (SIP) for particulate matter under the Clean Air Act. This submission contains the 24-hour fine particle National Ambient Air Quality Standards (NAAQS) promulgated by...

40 CFR 52.622 - Original identification of plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 40 Protection of Environment 3 2010-07-01 2010-07-01 false Original identification of plan. 52.622... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Hawaii § 52.622 Original identification of plan. (a) This section identified the original “State of Hawaii Air Pollution Control Implementation Plan...

Implementing Student Information Systems

ERIC Educational Resources Information Center

Sullivan, Laurie; Porter, Rebecca

2006-01-01

Implementing an enterprise resource planning system is a complex undertaking. Careful planning, management, communication, and staffing can make the difference between a successful and unsuccessful implementation. (Contains 3 tables.)

Non-energy resources, Connecticut and Rhode Island coastal waters

USGS Publications Warehouse

Neff, N.F.; Lewis, R.S.

1989-01-01

Cores collected from Long Island Sound, Connecticut, were used to establish control on the geologic framework of the area. Lithologic and stratigraphic analyses verified the presence of the following units: (1) Cretaceous coastal plain, (2) Pleistocene glacial till, (3) late Pleistocene glacial lake, (4) late Pleistocene glacial outwash, and (5) Holocene fluvial, estuarine and marine deposits. Cores collected in Block Island Sound, Rhode Island, were obtained from inferred, relict shoreline features and were analyzed for heavy mineral content. Concentrations ranged from 0.3 to 3.4%; no significant downcore changes were found. The results indicated that surficial sediments in areas of high-velocity tidal flow yield greater amounts of heavy minerals than do inferred placer deposits. During the second phase of the program of study, Connecticut and Rhode Island pooled resources to develop a study plan for the comprehensive quantification of all non-energy resources in the adjacent waters of the states. A literature and data survey was conducted to assess the occurrence, extent, and accessibility of these resources. Sand and gravel and heavy minerals were found in concentrations offering potential for resource exploitation. Constraints on exploitation include (1) water depth restrictions for the protection of shellfish beds and public beaches, (2) fishing activities, (3) military, commercial, and fishing vessel traffic, (4) seafloor cable routes and (5) dump sites. Deposits composed of Pleistocene glacial sediments and/or Holocene marine sediments in regions of little or no user conflict were identified as sites potentially suitable for resource exploitation. The study plan stated additional data needs (geophysical profiling and vibracore sampling) at these sites. Subsequent to these recommendations, high-resolution seismic profiles and sidescan sonographs were obtained from these sites. Seismic stratigraphic analyses confirm the presence of extensive deposits of potential economic value. ?? 1989.

40 CFR 49.4169-49.5510 - [Reserved

Code of Federal Regulations, 2014 CFR

2014-07-01

... ASSISTANCE INDIAN COUNTRY: AIR QUALITY PLANNING AND MANAGEMENT Implementation Plans for Tribes-Region VIII Federal Implementation Plan for Oil and Natural Gas Well Production Facilities; Fort Berthold Indian...

40 CFR 49.4169-49.5510 - [Reserved

Code of Federal Regulations, 2013 CFR

2013-07-01

... ASSISTANCE INDIAN COUNTRY: AIR QUALITY PLANNING AND MANAGEMENT Implementation Plans for Tribes-Region VIII Federal Implementation Plan for Oil and Natural Gas Well Production Facilities; Fort Berthold Indian...

International strategic minerals inventory summary report; zirconium

USGS Publications Warehouse

Towner, R.R.

1992-01-01

Zircon, a zirconium silicate, is currently the most important commercial zirconium-bearing mineral. Baddeleyite, a natural form of zirconia, is less important but has some specific end uses. Both zircon and baddeleyite occur in hard-rock and placer deposits, but at present all zircon production is from placer deposits. Most baddeleyite production is from hard-rock deposits, principally as a byproduct of copper and phosphate-rock mining. World zirconium resources in identified, economically exploitable deposits are about 46 times current production rates. Of these resources, some 71 percent are in South Africa, Australia, and the United States. The principal end uses of zirconium minerals are in ceramic applications and as refractories, abrasives, and mold linings in foundries. A minor amount, mainly of zircon, is used for the production of hafnium-free zirconium metal, which is used principally for sheathing fuel elements in nuclear reactors and in the chemical-processing industry, aerospace engineering, and electronics. Australia and South Africa are the largest zircon producers and account for more than 70 percent of world output; the United States and the Soviet Union account for another 20 percent. South Africa accounts for almost all the world's production of baddeleyite, which is about 2 percent of world production of contained zirconia. Australia and South Africa are the largest exporters of zircon. Unless major new deposits are developed in countries that have not traditionally produced zircon, the pattern of world production is unlikely to change by 2020. The proportions, however, of production that come from existing producing countries may change somewhat.

Assessment of mineral resource tracts in the Chugach National Forest, Alaska

USGS Publications Warehouse

Nelson, Steven W.; Miller, Marti L.

2000-01-01

Locatable minerals have been produced from the Chugach National Forest (CNF) for nearly 100 years. Past gold production has come from the Kenai Peninsula and the Girdwood, Port Wells, and Valdez areas. Copper and by-product gold and silver have been produced from mines at Ellamar, on Latouche Island, and near Valdez. Many of the past-producing properties were not mined out and contain significant inferred reserves of gold, copper, lead, zinc, and silver. This report outlines mineral resource areas (tracts) that contain both identified and undiscovered mineral resources. These tracts were drawn on the basis of one or more of the following criteria: (1) geochemical anomalies, (2) favorable geologic units, (3) presence of mines, prospects or mineral occurrences, and (4) geophysical anomalies. Bliss (1989) used six mineral deposit models to describe the types of deposits known from the CNF. Of these deposit types, only four are sufficiently known and defined in the CNF to be suitable for consideration in outlining and ranking of mineral resource tracts; these deposit types are: (1) Cyprus-type massive sulfide, (2) Chugach-type low-sulfide goldquartz veins, (3) placer gold, and (4) polymetallic vein. The U.S. Bureau of Mines indicated that most of the inferred mineral reserves in the CNF would not be economic to produce under current prices. Small-scale placer gold operations are a possible exception. Other known resources that have recorded past production (oil, coal, rock, sand, and gravel) are not addressed in this report.

Long-term measurements of residential radon, thoron, and thoron progeny concentrations around the Chhatrapur placer deposit, a high background radiation area in Odisha, India.

PubMed

Omori, Yasutaka; Prasad, Ganesh; Sorimachi, Atsuyuki; Sahoo, Sarata Kumar; Ishikawa, Tetsuo; Vidya Sagar, Devulapalli; Ramola, Rakesh Chand; Tokonami, Shinji

2016-10-01

The Chhatrapur placer deposit is found in a high background radiation area which has been recently identified on the southeastern coast of India. Previously, some geochemical studies of this area were carried out to assess external dose from radionuclides-bearing heavy mineral sands. In this study, radon, thoron and thoron progeny concentrations were measured in about 100 dwellings during three seasons (autumn-winter, summer, and rainy) in a 10- to 12-month period and annual doses due to inhalation of them were evaluated. The measurements were made by passive-type radon-thoron discriminative detectors and thoron progeny detectors in which solid state nuclear track detectors were deployed. The results show that radon and thoron concentrations differ by one order of magnitude depending on exposure periods, while thoron progeny concentration is nearly constant throughout the year. Since thorium-rich sand is distributed in the studied area, exposure to thoron is equal to, or exceeds, exposure to radon and is not negligible for dose evaluation. Based on the measurements, doses due to inhalation of radon and thoron are evaluated as 0.1-1.6 mSv y -1 and 0.2-3.8 mSv y -1 , respectively. The total dose is 0.8-4.6 mSv y -1 , which is the same order of magnitude as the worldwide value. Copyright © 2016 Elsevier Ltd. All rights reserved.

Geology and ore deposits of the Casto quadrangle, Idaho

USGS Publications Warehouse

Ross, Clyde P.

1934-01-01

The study of the Casto quadrangle was undertaken as the first item in a project to obtain more thorough knowledge of the general geology of southcentral Idaho on which to base study of the ore deposits of t he region. The quadrangle conta ins fragmentary exposures of Algonkian and Paleozoic sedimentary rocks, extensive deposits of old volcanic strata, presumably Permian, not heretofore recognized in this part of Idaho, and a thick succession of Oligocene(?) lava and pyroclastic rocks. The Idaho batholith and its satellites extend into the quadrangle, and in addition there a re large masses of Tertiary granitic rock, not previously distinguished in Idaho, and many Tertiary dikes, some of which are genetically associated with contact-metamorphic deposits. The area contains injection gneiss of complex origin, largely related to the Idaho batholith but in part resulting from injection by ~he Tertiary granitic rocks under relatively light load. Orogenic movement took place in Algonkian, Paleozoic, and Tertiary time. There is a summit peneplain or par tial peneplain of Tertiary, perhaps Pliocene age, and the erosional history since its elevation has been complex. The ore deposits include lodes and placers. The lodes are related to both the Idaho batholith and the Tert iary intrusive rocks and have yielded gold and copper ore of a total value of about 1,000,000. Placers, largely formed in an interglacial inter val, have yielded about an equal amount. There has been some prospecting but almost no production since 1916.

Healthcare Managers' Experiences of Leading the Implementation of Video Conferencing in Discharge Planning Sessions: An Interview Study.

PubMed

Hofflander, Malin; Nilsson, Lina; Eriksén, Sara; Borg, Christel

2016-03-01

This article describes healthcare managers' experiences of leading the implementation of video conferencing in discharge planning sessions as a new tool in everyday practice. Data collection took place through individual interviews and the interviews were analyzed using qualitative content analysis with an inductive approach. The results indicate that managers identified two distinct leadership perspectives when they reflected on the implementation process. They described a desired way of leading the implementation and communicating about the upcoming change, understanding and securing support for decisions, as well as ensuring that sufficient time is available throughout the change process. They also, however, described how they perceived that the implementation process was actually taking place, highlighting the lack of planning and preparation as well as the need for support and to be supportive, and having the courage to adopt and lead the implementation. It is suggested that managers at all levels require more information and training in how to encourage staff to become involved in designing their everyday work and in the implementation process. Managers, too, need ongoing organizational support for good leadership throughout the implementation of video conferencing in discharge planning sessions, including planning, start-up, implementation, and evaluation.

78 FR 34964 - Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-11

...] Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan... Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements'' which published in the... the 2008 ozone national ambient air quality standards (NAAQS) (the ``2008 ozone NAAQS'') that were...

ISS Payload Operations: The Need for and Benefit of Responsive Planning

NASA Technical Reports Server (NTRS)

Nahay, Ed; Boster, Mandee

2000-01-01

International Space Station (ISS) payload operations are controlled through implementation of a payload operations plan. This plan, which represents the defined approach to payload operations in general, can vary in terms of level of definition. The detailed plan provides the specific sequence and timing of each component of a payload's operations. Such an approach to planning was implemented in the Spacelab program. The responsive plan provides a flexible approach to payload operations through generalization. A responsive approach to planning was implemented in the NASA/Mir Phase 1 program, and was identified as a need during the Skylab program. The current approach to ISS payload operations planning and control tends toward detailed planning, rather than responsive planning. The use of detailed plans provides for the efficient use of limited resources onboard the ISS. It restricts flexibility in payload operations, which is inconsistent with the dynamic nature of the ISS science program, and it restricts crew desires for flexibility and autonomy. Also, detailed planning is manpower intensive. The development and implementation of a responsive plan provides for a more dynamic, more accommodating, and less manpower intensive approach to planning. The science program becomes more dynamic and responsive as the plan provides flexibility to accommodate real-time science accomplishments. Communications limitations and the crew desire for flexibility and autonomy in plan implementation are readily accommodated with responsive planning. Manpower efficiencies are accomplished through a reduction in requirements collection and coordination, plan development, and maintenance. Through examples and assessments, this paper identifies the need to transition from detailed to responsive plans for ISS payload operations. Examples depict specific characteristics of the plans. Assessments identify the following: the means by which responsive plans accommodate the dynamic nature of science programs and the crew desire for flexibility; the means by which responsive plans readily accommodate ISS communications constraints; manpower efficiencies to be achieved through use of responsive plans; and the implications of responsive planning relative to resource utilization efficiency.

Assessment of hydrology, water quality, and trace elements in selected placer-mined creeks in the birch creek watershed near central, Alaska, 2001-05

USGS Publications Warehouse

Kennedy, Ben W.; Langley, Dustin E.

2007-01-01

Executive Summary The U.S. Geological Survey, in cooperation with the Bureau of Land Management, completed an assessment of hydrology, water quality, and trace-element concentrations in streambed sediment of the upper Birch Creek watershed near Central, Alaska. The assessment covered one site on upper Birch Creek and paired sites, upstream and downstream from mined areas, on Frying Pan Creek and Harrison Creek. Stream-discharge and suspended-sediment concentration data collected at other selected mined and unmined sites helped characterize conditions in the upper Birch Creek watershed. The purpose of the project was to provide the Bureau of Land Management with baseline information to evaluate watershed water quality and plan reclamation efforts. Data collection began in September 2001 and ended in September 2005. There were substantial geomorphic disturbances in the stream channel and flood plain along several miles of Harrison Creek. Placer mining has physically altered the natural stream channel morphology and removed streamside vegetation. There has been little or no effort to re-contour waste rock piles. During high-flow events, the abandoned placer-mine areas on Harrison Creek will likely contribute large quantities of sediment downstream unless the mined areas are reclaimed. During 2004 and 2005, no substantial changes in nutrient or major-ion concentrations were detected in water samples collected upstream from mined areas compared with water samples collected downstream from mined areas on Frying Pan Creek and Harrison Creek that could not be attributed to natural variation. This also was true for dissolved oxygen, pH, and specific conductance-a measure of total dissolved solids. Sample sites downstream from mined areas on Harrison Creek and Frying Pan Creek had higher median suspended-sediment concentrations, by a few milligrams per liter, than respective upstream sites. However, it is difficult to attach much importance to the small downstream increase, less than 10 milligrams per liter, in median suspended-sediment concentration for either basin. During low-flow conditions in 2004 and 2005, previously mined areas investigated on Harrison Creek and on Frying Pan Creek did not contribute substantial suspended sediments to sample sites downstream from the mined areas. No substantial mining-related water- or sediment-quality problems were detected at any of the sites investigated in the upper Birch Creek watershed during low-flow conditions. Average annual streamflow and precipitation were near normal in 2002 and 2003. Drought conditions, extreme forest fire impact, and low annual streamflow set apart the 2004 and 2005 summer seasons. Daily mean streamflow for upper Birch Creek varied throughout the period of record-from maximums of about 1,000 cubic feet per second to minimums of about 20 cubic feet per second. Streamflow increased and decreased rapidly in response to rainfall and rapid snowmelt events because the steep slopes, thin soil cover, and permafrost areas in the watershed have little capacity to retain runoff. Median suspended-sediment concentrations for the 115 paired samples from Frying Pan Creek and 101 paired samples from Harrison Creek were less than the 20 milligrams per liter total maximum daily load. The total maximum daily load was set by the U.S. Environmental Protection Agency for the upper Birch Creek basin in 1996. Suspended-sediment paired-sample data were collected using automated samplers in 2004 and 2005, primarily during low-flow conditions. Suspended-sediment concentrations in grab samples from miscellaneous sites ranged from less than 1 milligram per liter during low-flow conditions to 1,386 milligrams per liter during a high-flow event on upper Birch Creek. Streambed-sediment samples were collected at six sites on Harrison Creek, two sites on Frying Pan Creek, and one site on upper Birch Creek. Trace-element concentrations of mercury, lead, and zinc in streambed sedimen

78 FR 9596 - Approval and Promulgation of Implementation Plans; New Jersey and New York Ozone Attainment...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-11

... Promulgation of Implementation Plans; New Jersey and New York Ozone Attainment Demonstrations AGENCY... approving the ozone attainment demonstration portion of comprehensive State Implementation Plan revisions submitted by New Jersey and New York to meet Clean Air Act requirements for attaining the 1997 8-hour ozone...

78 FR 5346 - Approval and Promulgation of Air Quality Implementation Plans; Massachusetts and New Hampshire...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-01-25

...-FRL-9754-7] Approval and Promulgation of Air Quality Implementation Plans; Massachusetts and New... (EPA). ACTION: Proposed rule. SUMMARY: EPA is proposing to approve State Implementation Plan (SIP... repair network for an on-board diagnostic (OBD2) testing program for model year 1996 and newer vehicles...

78 FR 78263 - Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Update of the Motor...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-12-26

...] Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Update of the Motor Vehicle... Implementation Plan (SIP). The revisions consist of an update to the SIP-approved Motor Vehicle Emissions Budgets... operation, and special arrangements should be made for deliveries of boxed information. Instructions: Direct...

77 FR 23193 - Revisions to the California State Implementation Plan, Yolo-Solano Air Quality Management District

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-18

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2012-0180; FRL-9652-3] Revisions to the California State Implementation Plan, Yolo- Solano Air Quality Management District AGENCY... the Yolo-Solano Air Quality Management District portion of the California State Implementation Plan...

78 FR 7703 - Revisions to the California State Implementation Plan, South Coast Air Quality Management...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-04

... the California State Implementation Plan, South Coast Air Quality Management District, Proposed Rule... approve a revision to the South Coast Air Quality Management District (SCAQMD) portion of the California... digesters. Rule 1127 was designed to implement the 2003 Air Quality Management Plan (AQMP) control measure...

77 FR 32483 - Revisions to the California State Implementation Plan, South Coast Air Quality Management District

Federal Register 2010, 2011, 2012, 2013, 2014

2012-06-01

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2012-0236; FRL-9670-9] Revisions to the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District portion of the California State Implementation Plan...

75 FR 32353 - Revisions to the California State Implementation Plan, South Coast Air Quality Management District

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-08

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2010-0276; FRL-9139-8] Revisions to the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District portion of the California State Implementation Plan...

76 FR 54384 - California State Implementation Plan, South Coast Air Quality Management District; Withdrawal of...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-01

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2011-0537; FRL-9457-6] California State Implementation Plan, South Coast Air Quality Management District; Withdrawal of Direct Final Rule... Implementation Plan (SIP). This revision concerned South Coast Air Quality Management District (SCAQMD) Rule 1143...

77 FR 39180 - Withdrawal of Direct Final Rule Revising the California State Implementation Plan, South Coast...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-02

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2012-0236; FRL-9690-9] Withdrawal of Direct Final Rule Revising the California State Implementation Plan, South Coast Air Quality Management... State Implementation Plan (SIP). This revision concerned South Coast Air Quality Management District...

76 FR 42557 - Approval and Promulgation of Air Quality Implementation Plans; Delaware; Regional Haze State...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-19

... Promulgation of Air Quality Implementation Plans; Delaware; Regional Haze State Implementation Plan AGENCY: Environmental Protection Agency (EPA). ACTION: Final rule. SUMMARY: EPA is approving the Delaware Regional Haze... visibility in mandatory Class I areas through a regional haze program. EPA is also approving this revision...

75 FR 81471 - Approval and Promulgation of Air Quality Implementation Plans; Minnesota; Sulfur Dioxide SIP...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-28

... Promulgation of Air Quality Implementation Plans; Minnesota; Sulfur Dioxide SIP Revision for Marathon Petroleum... October 6, 2009, Minnesota submitted a request for a sulfur dioxide State Implementation Plan revision for... installation of new boilers and a sulfur recovery unit and changes to three existing heaters. Overall, this...

40 CFR 52.63 - PM10 State Implementation Plan development in group II areas.

Code of Federal Regulations, 2014 CFR

2014-07-01

... development in group II areas. 52.63 Section 52.63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Alabama § 52.63 PM10 State Implementation Plan development in group II areas. On March 15, 1989, the State submitted a...

40 CFR 52.881 - PM10 State implementation plan development in group II areas.

Code of Federal Regulations, 2012 CFR

2012-07-01

... development in group II areas. 52.881 Section 52.881 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Kansas § 52.881 PM10 State implementation plan development in group II areas. The state has submitted a committal SIP for...

40 CFR 52.63 - PM10 State Implementation Plan development in group II areas.

Code of Federal Regulations, 2010 CFR

2010-07-01

... development in group II areas. 52.63 Section 52.63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Alabama § 52.63 PM10 State Implementation Plan development in group II areas. On March 15, 1989, the State submitted a...

40 CFR 52.63 - PM10 State Implementation Plan development in group II areas.

Code of Federal Regulations, 2011 CFR

2011-07-01

... development in group II areas. 52.63 Section 52.63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Alabama § 52.63 PM10 State Implementation Plan development in group II areas. On March 15, 1989, the State submitted a...

40 CFR 52.935 - PM10 State implementation plan development in group II areas.

Code of Federal Regulations, 2010 CFR

2010-07-01

... development in group II areas. 52.935 Section 52.935 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Kentucky § 52.935 PM10 State implementation plan development in group II areas. On July 7, 1988, the State submitted a...

40 CFR 52.935 - PM10 State implementation plan development in group II areas.

Code of Federal Regulations, 2014 CFR

2014-07-01

... development in group II areas. 52.935 Section 52.935 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Kentucky § 52.935 PM10 State implementation plan development in group II areas. On July 7, 1988, the State submitted a...

40 CFR 52.935 - PM10 State implementation plan development in group II areas.

Code of Federal Regulations, 2013 CFR

2013-07-01

... development in group II areas. 52.935 Section 52.935 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Kentucky § 52.935 PM10 State implementation plan development in group II areas. On July 7, 1988, the State submitted a...

40 CFR 52.881 - PM10 State implementation plan development in group II areas.

Code of Federal Regulations, 2010 CFR

2010-07-01

... development in group II areas. 52.881 Section 52.881 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Kansas § 52.881 PM10 State implementation plan development in group II areas. The state has submitted a committal SIP for...

40 CFR 52.935 - PM10 State implementation plan development in group II areas.

Code of Federal Regulations, 2011 CFR

2011-07-01

... development in group II areas. 52.935 Section 52.935 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Kentucky § 52.935 PM10 State implementation plan development in group II areas. On July 7, 1988, the State submitted a...

40 CFR 52.881 - PM10 State implementation plan development in group II areas.

Code of Federal Regulations, 2011 CFR

2011-07-01

... development in group II areas. 52.881 Section 52.881 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Kansas § 52.881 PM10 State implementation plan development in group II areas. The state has submitted a committal SIP for...

40 CFR 52.881 - PM10 State implementation plan development in group II areas.

Code of Federal Regulations, 2014 CFR

2014-07-01

... development in group II areas. 52.881 Section 52.881 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Kansas § 52.881 PM10 State implementation plan development in group II areas. The state has submitted a committal SIP for...

40 CFR 52.63 - PM10 State Implementation Plan development in group II areas.

Code of Federal Regulations, 2012 CFR

2012-07-01

... development in group II areas. 52.63 Section 52.63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Alabama § 52.63 PM10 State Implementation Plan development in group II areas. On March 15, 1989, the State submitted a...

40 CFR 52.63 - PM10 State Implementation Plan development in group II areas.

Code of Federal Regulations, 2013 CFR

2013-07-01

... development in group II areas. 52.63 Section 52.63 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Alabama § 52.63 PM10 State Implementation Plan development in group II areas. On March 15, 1989, the State submitted a...

40 CFR 52.881 - PM10 State implementation plan development in group II areas.

Code of Federal Regulations, 2013 CFR

2013-07-01

... development in group II areas. 52.881 Section 52.881 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Kansas § 52.881 PM10 State implementation plan development in group II areas. The state has submitted a committal SIP for...

40 CFR 52.935 - PM10 State implementation plan development in group II areas.

Code of Federal Regulations, 2012 CFR

2012-07-01

... development in group II areas. 52.935 Section 52.935 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Kentucky § 52.935 PM10 State implementation plan development in group II areas. On July 7, 1988, the State submitted a...

75 FR 73026 - Approval and Promulgation of Air Quality Implementation Plans; Indiana; Clean Air Interstate Rule

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-29

... Promulgation of Air Quality Implementation Plans; Indiana; Clean Air Interstate Rule AGENCY: Environmental... State Implementation Plan (SIP) under the Clean Air Act (CAA). The State has submitted amendments to the Indiana Administrative Code (IAC), which supplement Indiana's Clean Air Interstate Rule (CAIR), for which...

75 FR 55978 - Approval and Promulgation of Air Quality Implementation Plans; Texas; Revisions to the New Source...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-15

... Implementation Plan (SIP); Prevention of Significant Deterioration (PSD) AGENCY: Environmental Protection Agency... Texas PSD State Implementation Plan (SIP). EPA is approving a SIP revision submitted February 1, 2006... Texas PSD SIP; it merely approves reorganization and renumbering of the Texas PSD SIP rules. Further...

78 FR 54813 - Approval and Promulgation of Air Quality Implementation Plans; Maine; Oxides of Nitrogen...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-06

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Parts 52 [EPA-R01-OAR-2012-0895; FRL- 9900-85-Region1] Approval and Promulgation of Air Quality Implementation Plans; Maine; Oxides of Nitrogen Exemption and... proposed Approval and Promulgation of Air Quality Implementation Plans; Maine; Oxides of Nitrogen Exemption...

77 FR 50660 - Limited Approval and Disapproval of Air Quality Implementation Plans; Nevada; Clark County...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-08-22

... Approval and Disapproval of Air Quality Implementation Plans; Nevada; Clark County; Stationary Source... Clark County, Nevada. DATES: Any comments on this proposal must arrive by September 7, 2012. ADDRESSES... regulations submitted for approval into the Clark County portion of the Nevada State Implementation Plan (SIP...

75 FR 9373 - Approval and Promulgation of Implementation Plans; New York State Implementation Plan Revision

Federal Register 2010, 2011, 2012, 2013, 2014

2010-03-02

... for State Implementation Plan (SIP) Submissions? In 1997, EPA revised the health-based national... that ozone causes adverse health effects at lower ozone concentrations and over longer periods of time... standard would be more protective of human health, especially with regard to children and adults who are...

75 FR 21197 - Approval and Promulgation of Air Quality Implementation Plans; New Mexico; Revisions to New...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-23

... Promulgation of Air Quality Implementation Plans; New Mexico; Revisions to New Mexico Transportation Conformity... approve revisions to the New Mexico State Implementation Plan (SIP) concerning the State transportation... action on SIP revisions pertaining to the State of New Mexico. We have published a direct final rule...

75 FR 48894 - Approval and Promulgation of Air Quality Implementation Plans; New Mexico; Revisions to Emissions...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-12

... Promulgation of Air Quality Implementation Plans; New Mexico; Revisions to Emissions Inventory Reporting.... SUMMARY: The EPA is proposing to approve revisions to the New Mexico State Implementation Plan (SIP... Quality Standards that EPA has established for criteria pollutants such as ozone, particulate matter, and...

Generic Fortran Containers (GFC)

DOE Office of Scientific and Technical Information (OSTI.GOV)

Liakh, Dmitry

2016-09-01

The Fortran language does not provide a standard library that implements generic containers, like linked lists, trees, dictionaries, etc. The GFC software provides an implementation of generic Fortran containers natively written in Fortran 2003/2008 language. The following containers are either already implemented or planned: Stack (done), Linked list (done), Tree (done), Dictionary (done), Queue (planned), Priority queue (planned).

77 FR 24148 - Revision to the Hawaii State Implementation Plan, Minor New Source Review Program

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-23

... Hawaii State Implementation Plan, Minor New Source Review Program AGENCY: Environmental Protection Agency... final action to approve revisions to the Hawaii State Implementation Plan (SIP). These revisions would update and replace the minor new source review rules that EPA approved into the Hawaii SIP in 1983. DATES...

76 FR 8330 - Approval and Promulgation of Air Quality Implementation Plans; Virginia; Revision to the...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-14

... Promulgation of Air Quality Implementation Plans; Virginia; Revision to the Definition of Volatile Organic... approve the State Implementation Plan (SIP) revision submitted by the Commonwealth of Virginia consisting... section of this Federal Register, EPA is approving Virginia's SIP submittal as a direct final rule without...

75 FR 8575 - Approval and Promulgation of Air Quality Implementation Plans; Virginia; Revisions to the...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-02-25

... Promulgation of Air Quality Implementation Plans; Virginia; Revisions to the Definition of Volatile Organic... proposes to approve the State Implementation Plan (SIP) revision submitted by the Commonwealth of Virginia... (VOC). In the Final Rules section of this Federal Register, EPA is approving Virginia's SIP submittal...

77 FR 58312 - Revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-09-20

... the California State Implementation Plan, San Joaquin Valley Unified Air Pollution Control District... revisions to the California State Implementation Plan, San Joaquin Valley Unified Air Pollution Control... section 307(b)(2)). List of Subjects in 40 CFR Part 52 Environmental protection, Air pollution control...

75 FR 81555 - Approval and Promulgation of Air Quality Implementation Plans; Minnesota; Sulfur Dioxide SIP...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-28

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R05-OAR-2009-0808; FRL-9243-4] Approval and Promulgation of Air Quality Implementation Plans; Minnesota; Sulfur Dioxide SIP Revision for Marathon Petroleum... proposing to approve a sulfur dioxide State Implementation Plan revision request for Marathon Petroleum in...

40 CFR 49.9866 - Contents of implementation plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

... health or welfare. (i) Section 49.137Rule for air pollution episodes. (j) Section 49.138Rule for the registration of air pollution sources and the reporting of emissions. (k) Section 49.139Rule for non-Title V... ASSISTANCE TRIBAL CLEAN AIR ACT AUTHORITY Implementation Plans for Tribes-Region X Implementation Plan for...

76 FR 14602 - Approval and Promulgation of Air Quality Implementation Plans; Louisiana; Revisions To Control...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-17

... Promulgation of Air Quality Implementation Plans; Louisiana; Revisions To Control Volatile Organic Compound...: Proposed rule. SUMMARY: EPA is proposing to approve State Implementation Plan (SIP) revisions for control... submitted to EPA on August 31, 2010. EPA is also proposing to approve a SIP revision for control of emission...

78 FR 28173 - Approval and Promulgation of Air Quality Implementation Plans; Indiana; Sulfur Dioxide and...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-14

...-9811-5] Approval and Promulgation of Air Quality Implementation Plans; Indiana; Sulfur Dioxide and Nitrogen Dioxide Ambient Air Quality Standards AGENCY: Environmental Protection Agency (EPA). ACTION... implementation plan (SIP) for nitrogen dioxide (NO 2 ) and sulfur dioxide (SO 2 ) under the Clean Air Act. This...

75 FR 65594 - Approval and Promulgation of Air Quality Implementation Plans; Ohio; Ohio Ambient Air Quality...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-26

... Promulgation of Air Quality Implementation Plans; Ohio; Ohio Ambient Air Quality Standards AGENCY... the Ohio Administrative Code (OAC) relating to the consolidation of Ohio's Ambient Air Quality Standards (AAQS) into Ohio's State Implementation Plan (SIP) under the Clean Air Act. On April 8, 2009, and...

77 FR 12524 - Approval and Promulgation of Air Quality Implementation Plans; Indiana; Lead Ambient Air Quality...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-01

... Promulgation of Air Quality Implementation Plans; Indiana; Lead Ambient Air Quality Standards AGENCY... Indiana State Implementation Plan (SIP) for lead (Pb) under the Clean Air Act (CAA). This submittal incorporates the National Ambient Air Quality Standards (NAAQS) for Pb promulgated by EPA in 2008. DATES...

75 FR 10416 - Approval and Promulgation of Implementation Plans; Texas; Revisions to Chapter 116 Which Relate...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-03-08

... Promulgation of Implementation Plans; Texas; Revisions to Chapter 116 Which Relate to the Application Review... direct final action to approve revisions to the applicable State Implementation Plan (SIP) for the State... Texas Health and Safety Code, section 382.0566, concerning specific deadlines for review and issuance of...

Actor coalitions and implementation in strategic delta planning: Opening the Haringvliet sluices in the Netherlands

NASA Astrophysics Data System (ADS)

Vermoolen, Myrthe; Hermans, Leon

2016-04-01

The sustained development of urbanizing deltas is influenced by natural and societal processes. These processes are characterized by their long time span, in which conflicting interests of different stakeholders have to be reconciled. Reaching consent between actors is a challenge itself, but maintaining this consent throughout different stages of strategic planning - from advocacy and agenda setting to implementation - over these long periods of time is even more difficult. The implementation stage still includes many different actors involved, some of which are different than the ones who agreed before, due to both the long run of the strategic delta planning, and to a shift of tasks and responsibilities. Thus, implementation of strategic plans often features delays, deviations of agreed plans and unintended outcomes. A key question therefore is how coalition dynamics in (pre-)planning stages influence and are influenced by the coalition dynamics during implementation. The different stages in strategic planning are often studied from either a plan formulation or an implementation perspective, but the connection between the two proves an important bottleneck for strategic planning in deltas. For instance, many building with nature solutions are still in their pilot-phase, and their upscaling can profit from lessons concerning past implementation efforts. The proposed contribution will use the case of the management of the Dutch Haringvliet sluices and the decision ('Kierbesluit') in 2000 to put these sluices ajar, to study the link between the different strategic delta planning stages and the role of the formation and change of actor coalitions herein. With the completion of the Haringvliet dam with outlet sluices in 1970, the Haringvliet estuary of the rivers Rhine and Meuse was closed off from the sea, creating a fresh water lake. This was done to make the Dutch Southwest delta safe from flooding, and had positive effects for agricultural water supply and drinking water, but negative consequences for the ecological quality and biodiversity. In the 1980s environmental awareness increased. To restore natural processes, it was decided in 2000 to put the sluices 'ajar' as a first step towards the strategic long-term vision of tidal restoration and major rehabilitation of the Rhine-Meuse estuary. First planning was to have the Kierbesluit implemented in 2005. However, this has been put off again and again, and since the actual implementation started in 2013, planning is to have the infrastructures ready to start opening the sluices in 2018 - 13 years later. What was supposed to be the first step towards full estuarine recovery has become an end goal itself, with implementing actors strictly focusing on putting the sluices ajar and compensating for fresh water loss, dismissing building with nature possibilities behind the dam. The Advocacy Coalition Framework is used as a starting point for analysis, and will be altered and detailed with insights from implementation literature to identify lessons regarding the role and dynamics of actor coalitions from the planning to implementation stage of strategic delta planning.

Participatory approach in planning for low carbon and eco-village: A case of Felda Taib Andak

NASA Astrophysics Data System (ADS)

Ngah, I.; Zulkifli, A. S.

2014-02-01

Participatory approaches have becoming an important tool in planning of sustainable communities. Although participation is conceived as a malleable concept there are certain methods that planners can adopt to ensure a meaningful participation. This paper will provide some experiences and lessons on how participatory planning could be carried out with local people, the role of planners in the process of plan preparation, implementation and the outcome. This paper first explores some of the meanings of participation, the criteria of participation and the approaches of participation in planning for sustainable community. The second part is a description and discussion of how participatory approach in planning was applied in planning for low carbon and eco-village in Iskandar Malaysia based on a case study of planning of Felda Taib Andak scheme. The participatory approach involved a series of meetings, site visit and focus group discussions with representative of the Felda Village to come out with action plan and actual implementation. From focus group discussions a roadmap consisted of a vision and objectives and a dozen actions were formulated and adopted. In the process of implementation the main implementation & coordination committee was form in which the author (planner) is one of its members to look into fund raising & implementation strategies together with the local people. Several task forces or sub committees responsible to implement the dozen actions were also formed. The outcome was encouraging in which some of the actions such as planting of bamboo trees, reduction of pollution from oil palm factory and bicycling activities has been implemented and shown progress. The paper also highlights some of the issues and challenges in participatory planning.

77 FR 35873 - Approval, Disapproval and Promulgation of Air Quality Implementation Plan; Utah; Maintenance Plan...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-06-15

... change the maintenance plan's trigger for contingency measures. Instead of a defined trigger, the revised plan would allow the State to consider several factors in deciding whether contingency measures should... the maintenance plan, the State must commit to implement one or more contingency measures within a set...

76 FR 55541 - Approval and Promulgation of Air Quality Implementation Plans; West Virginia: Kentucky; Ohio...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-07

... Cabell and Wayne Counties in their entireties and a portion of Mason County (Graham Tax District) in West... reasonable further progress (RFP) plan, contingency measures, and other planning State Implementation Plan... Regulatory Development Section, Air Planning Branch, Air, Pesticides and Toxics Management Division, U.S...

40 CFR 49.9861 - Identification of plan.

Code of Federal Regulations, 2013 CFR

2013-07-01

... Implementation Plan for the Burns Paiute Tribe of the Burns Paiute Indian Colony of Oregon § 49.9861 Identification of plan. This section and §§ 49.9862 through 49.9890 contain the implementation plan for the Burns Paiute Tribe of the Burns Paiute Indian Colony. This plan consists of a combination of Tribal rules and...

40 CFR 49.9861 - Identification of plan.

Code of Federal Regulations, 2011 CFR

2011-07-01

... Implementation Plan for the Burns Paiute Tribe of the Burns Paiute Indian Colony of Oregon § 49.9861 Identification of plan. This section and §§ 49.9862 through 49.9890 contain the implementation plan for the Burns Paiute Tribe of the Burns Paiute Indian Colony. This plan consists of a combination of Tribal rules and...

40 CFR 49.9861 - Identification of plan.

Code of Federal Regulations, 2012 CFR

2012-07-01

... Implementation Plan for the Burns Paiute Tribe of the Burns Paiute Indian Colony of Oregon § 49.9861 Identification of plan. This section and §§ 49.9862 through 49.9890 contain the implementation plan for the Burns Paiute Tribe of the Burns Paiute Indian Colony. This plan consists of a combination of Tribal rules and...

40 CFR 49.9861 - Identification of plan.

Code of Federal Regulations, 2014 CFR

2014-07-01

... Implementation Plan for the Burns Paiute Tribe of the Burns Paiute Indian Colony of Oregon § 49.9861 Identification of plan. This section and §§ 49.9862 through 49.9890 contain the implementation plan for the Burns Paiute Tribe of the Burns Paiute Indian Colony. This plan consists of a combination of Tribal rules and...

40 CFR 62.8870 - Identification of plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) APPROVAL AND PROMULGATION OF STATE PLANS FOR DESIGNATED FACILITIES AND POLLUTANTS Ohio Landfill Gas Emissions from Existing Municipal Solid Waste Landfills § 62.8870 Identification of plan. The Ohio State Implementation Plan for implementing the Federal Municipal Solid Waste Landfill Emission Guidelines including...

Manual for Preparing Individualized Education Programs.

ERIC Educational Resources Information Center

Baylor, Terrill D.

Presented are guidelines for developing an individualized program and services plan, an individual implementation plan, and daily activity and strategy plans for handicapped students. Instructions are outlined for utilizing forms related to planning and implementation of individualized education programs. Appended are sample forms. (SBH)

Mapping of coastal aquifer vulnerable zone in the south west coast of Kanyakumari, South India, using GIS-based DRASTIC model.

PubMed

Kaliraj, S; Chandrasekar, N; Peter, T Simon; Selvakumar, S; Magesh, N S

2015-01-01

The south west coast of Kanyakumari district in Tamil Nadu, India, is significantly affected by seawater intrusion and diffusion of pollutants into the aquifers due to unregulated beach placer mining and other anthropogenic activities. The present study investigates the vulnerability of the coastal aquifers using Geographic Information System (GIS)-based DRASTIC model. The seven DRASTIC parameters have been analyzed using the statistical equation of this model to demarcate the vulnerable zones for aquifer contamination. The vulnerability index map is prepared from the weighted spatial parameters, and an accounting of total index value ranged from 85 to 213. Based on the categorization of vulnerability classes, the high vulnerable zones are found near the beach placer mining areas between Manavalakurichi and Kodimanal coastal stretches. The aquifers associated with settlements and agricultural lands in the middle-eastern part have experienced high vulnerability due to contaminated water bodies. Similarly, the coastal areas of Thengapattinam and Manakudi estuary and around the South Tamaraikulam have also been falling under high vulnerability condition due to backwater and saltpan. In general, the nearshore region except the placer mining zone and the backwater has a moderately vulnerable condition, and the vulnerability index values range from 149 to180. Significantly, the northern and northeastern uplands and some parts of deposition zones in the middle-south coast have been identified as low to no vulnerable conditions. They are structurally controlled by various geological features such as charnockite, garnet biotite gneiss and granites, and sand dunes, respectively. The aquifer vulnerability assessment has been cross-verified by geochemical indicators such as total dissolved solids (TDS), Cl(-), HCO₃(-), and Cl(-)/HCO₃(-) ratio. The high ranges of TDS (1,842--3,736 mg/l) and Cl(-) (1,412--2,112 mg/l) values are well correlated with the observed high vulnerable zones in the study area. The Cl(-)/HCO₃(-) ratio (7.13 to 12.18) of the high vulnerable zone obviously indicates deterioration of the aquifer contamination. Sensitivity analysis has also been performed to evaluate sensitivity of the individual DRASTIC parameters to aquifer vulnerability. This reveals the net recharge rate and groundwater table depth are becoming more sensitive to aquifer contamination. It is realized that the GIS is an effective platform for aquifer vulnerability mapping with reliable accuracy, and hence, the study is more useful for sustainable water resource management and the aquifer conservation.

Opaque mineralogy and resource potential of placer gold in the stream sediments between Duba and Al Wajh, Red Sea coast, northwestern Saudi Arabia

NASA Astrophysics Data System (ADS)

Moufti, Asaad M. B.

2014-11-01

Mineralogical studies revealed that the stream sediments in northwestern Saudi Arabia between Duba and Al Wajh on the Red Sea coast are auriferous and can represent a potential source of easily recoverable placer gold. The detailed ore microscopic study supported by fire assay data of stream sediments at the southern sector of Duba-Al Wajh (Wadi Al Miyah, Wadi Haramil and Wadi Thalbah) in NW Saudi Arabia show economic concentrations of gold in their silt fraction (40-63 μm). However, particles of extremely fine “dusty” gold (⩽40 μm in size) are identified in most stations as independent grains. The maximum gold content in the samples of Wadi Al Miyah is 13.61 wt% which is reported for the light fraction (⩽40 μm). Maximum gold content in the heavy fractions of Wadi Haramil stream sediments amounts 6.90 g/t Au in a relatively coarse fraction (63-125 μm). The size still fulfills the silt fraction, but the coarsening of gold can be correlated with either original size of native gold in the Neoproterozoic mineralized zone or/and distance of transportation. It appears that the most gold-rich fractions of the analyzed samples are those from Wadi Thalbah. They have the highest index figure, which suggests that its placer gold may be economically exploitable. Gold content in the heavy fractions of samples from Wadi Thalbah is high and lies within a wide range (6.27-28.83 g/t), except for a single sample collected at the upstream with 0.77 g/t Au only. Fire assay data of samples from three wadis at the northern sector show that their gold content is clearly lower than in the samples from the southern sector. Only few samples from Wadi South Marwah are promising because they contain reasonable gold content (3.10-3.60 g/t) before heavy liquid separation. The two samples give gold content up to 11.03 g/t in their heavy mineral concentrate. The heavy fractions from both Wadi Al Amud and Wadi Salma are poor in gold where the maximum content of the metal in these concentrates are 1.32 and 1.17 g/t, respectively. Generally, the heavy mineral concentrates of both wadis contain ⩽1 g/t Au which is presently uneconomic. Generally, fire assay data of gold proved that samples from the wadis in the southern sectors are more promising for future gold exploration and exploitation.

Chicago-St. Louis high speed rail plan

DOE Office of Scientific and Technical Information (OSTI.GOV)

Stead, M.E.

1994-12-31

The Illinois Department of Transportation (IDOT), in cooperation with Amtrak, undertook the Chicago-St. Louis High Speed Rail Financial and Implementation Plan study in order to develop a realistic and achievable blueprint for implementation of high speed rail in the Chicago-St. Louis corridor. This report presents a summary of the Price Waterhouse Project Team`s analysis and the Financial and Implementation Plan for implementing high speed rail service in the Chicago-St. Louis corridor.

Urban family physician plan in Iran: challenges of implementation in Kerman.

PubMed

Dehnavieh, Reza; Kalantari, Ali Reza; Jafari Sirizi, Mohammad

2015-01-01

The Family Physician Plan has recently been implemented in three provinces of Iran on a pilot basis and is going to be implemented throughout Iran in the future. Through a qualitative design, this study aims to determine probable implementation challenges of Family Physician Plan in Kerman. This study was conducted in Kerman in 2013. Data were collected through interviews with 21 experts in the field. Sampling continued until data saturation level was achieved. All interviews were recorded and then analyzed, and main themes and subgroups were extracted from them based on a framework analysis model. most prevalent establishment challenges of Family Physician Plan were classified into policy-making, financial supply, laws and resources. The urban Family Physician Plan can be carried out more effectively by implementing this plan step by step, highlighting the relationships between the related organizations, using new payment mechanisms e.g Per Capita, DRG, make national commitment and proper educational programs for providers, development the health electronic Record, justifying providers and community about advantages of this plan, clarifying regulatory status about providers' Duties and most importantly considering a specific funding source.

40 CFR 52.1119 - Identification of plan-conditional approval.

Code of Federal Regulations, 2010 CFR

2010-07-01

... Implementation Plan Revision for a Small Business Technical and Environmental Compliance Assistance Program dated... 40 Protection of Environment 4 2010-07-01 2010-07-01 false Identification of plan-conditional... PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Massachusetts § 52.1119...

40 CFR 52.1519 - Identification of plan-conditional approval.

Code of Federal Regulations, 2010 CFR

2010-07-01

... Implementation Plan Revision for a Small Business Technical and Environmental compliance Assistance Program dated... 40 Protection of Environment 4 2010-07-01 2010-07-01 false Identification of plan-conditional... PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) New Hampshire § 52.1519...

40 CFR 52.670 - Identification of plan.

Code of Federal Regulations, 2011 CFR

2011-07-01

...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Idaho § 52.670 Identification of plan. Link to an..., 2011. (a) Purpose and scope. This section sets forth the applicable State implementation plan for Idaho.... (c) EPA approved regulations. EPA—Approved Idaho Regulations State citation Title/subject State...

40 CFR 52.670 - Identification of plan.

Code of Federal Regulations, 2013 CFR

2013-07-01

...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Idaho § 52.670 Identification of plan. (a) Purpose and scope. This section sets forth the applicable State implementation plan for Idaho under section 110 of..._locations.html. (c) EPA approved regulations. EPA—APPROVED IDAHO REGULATIONS AND STATUTES State citation...

40 CFR 52.670 - Identification of plan.

Code of Federal Regulations, 2012 CFR

2012-07-01

...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Idaho § 52.670 Identification of plan. (a) Purpose and scope. This section sets forth the applicable State implementation plan for Idaho under section 110 of.... (c) EPA approved regulations. EPA—Approved Idaho Regulations State citation Title/subject State...

40 CFR 52.670 - Identification of plan.

Code of Federal Regulations, 2014 CFR

2014-07-01

...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Idaho § 52.670 Identification of plan. (a) Purpose and scope. This section sets forth the applicable State implementation plan for Idaho under section 110 of..._locations.html. (c) EPA approved regulations. EPA—APPROVED IDAHO REGULATIONS AND STATUTES State citation...

40 CFR 52.1870 - Identification of plan.

Code of Federal Regulations, 2013 CFR

2013-07-01

...) Title of plan: “Implementation Plan for the Control of Suspended Particulates, Sulfur Dioxide, Carbon... 20, 1972, by the Ohio Air Pollution Control Board. (2) State provisions for making emissions data... Quality Control Region” and the “Implementation Plan to Achieve Ambient Air Quality Standard for...

40 CFR 52.620 - Identification of plan.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Hawaii § 52.620 Identification of plan. (a) Purpose and scope. This section sets forth the applicable State implementation plan for State of Hawaii under...-Approved State of Hawaii Regulations State citation Title/subject Effective date EPA approval date...

We have the programme, what next? Planning the implementation of an injury prevention programme

PubMed Central

Donaldson, Alex; Lloyd, David G; Gabbe, Belinda J; Cook, Jill

2017-01-01

Background and aim The impact of any injury prevention programme is a function of the programme and its implementation. However, real world implementation of injury prevention programmes is challenging. Lower limb injuries (LLIs) are common in community Australian football (community-AF) and it is likely that many could be prevented by implementing exercise-based warm-up programmes for players. This paper describes a systematic, evidence-informed approach used to develop the implementation plan for a LLI prevention programme in community-AF in Victoria, Australia. Methods An ecological approach, using Step 5 of the Intervention Mapping health promotion programme planning protocol, was taken. Results An implementation advisory group was established to ensure the implementation plan and associated strategies were relevant to the local context. Coaches were identified as the primary programme adopters and implementers within an ecological system including players, other coaches, first-aid providers, and club and league administrators. Social Cognitive Theory was used to identify likely determinants of programme reach, adoption and implementation among coaches (eg, knowledge, beliefs, skills and environment). Diffusion of Innovations theory, the Implementation Drivers framework and available research evidence were used to identify potential implementation strategies including the use of multiple communication channels, programme resources, coach education and mentoring. Conclusions A strategic evidence-informed approach to implementing interventions will help maximise their population impact. The approach to implementation planning described in this study relied on an effective researcher-practitioner partnership and active engagement of stakeholders. The identified implementation strategies were informed by theory, evidence and an in-depth understanding of the implementation context. PMID:26787739

Increasing In-Service Teacher Implementation of Classroom Management Practices through Consultation, Implementation Planning, and Participant Modeling

ERIC Educational Resources Information Center

Hagermoser Sanetti, Lisa M.; Williamson, Kathleen M.; Long, Anna C. J.; Kratochwill, Thomas R.

2018-01-01

Numerous evidence-based classroom management strategies to prevent and respond to problem behavior have been identified, but research consistently indicates teachers rarely implement them with sufficient implementation fidelity. The purpose of this study was to evaluate the effectiveness of implementation planning, a strategy involving logistical…

33 CFR 385.13 - Projects implemented under additional program authority.

Code of Federal Regulations, 2010 CFR

2010-07-01

... Implementation Report is prepared and approved in accordance with § 385.26; and (3) Not exceed a total cost of... RESTORATION PLAN CERP Implementation Processes § 385.13 Projects implemented under additional program authority. (a) To expedite implementation of the Plan, the Corps of Engineers and non-Federal sponsors may...

40 CFR 109.5 - Development and implementation criteria for State, local and regional oil removal contingency plans.

Code of Federal Regulations, 2010 CFR

2010-07-01

... regional oil removal contingency plans. Criteria for the development and implementation of State, local and... 40 Protection of Environment 21 2010-07-01 2010-07-01 false Development and implementation criteria for State, local and regional oil removal contingency plans. 109.5 Section 109.5 Protection of...

76 FR 36471 - Approval and Promulgation of Air Quality Implementation Plans; Virginia; Adoption of the Revised...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-22

... Promulgation of Air Quality Implementation Plans; Virginia; Adoption of the Revised Nitrogen Dioxide Standard... of adding the new 1-hour nitrogen dioxide (NO 2 ) standard at a level of 100 parts per billion (ppb... Promulgation of Air Quality Implementation Plans; Virginia; Adoption of the Revised Nitrogen Dioxide Standards...

76 FR 40817 - Implementation of Section 224 of the Act; A National Broadband Plan for Our Future

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-12

...-50] Implementation of Section 224 of the Act; A National Broadband Plan for Our Future AGENCY... information collection requirements. The Office of Management and Budget (OMB) gave approval for these..., Implementation of Section 224 of the Act; A National Broadband Plan for Our Future. DATES: The final rules...

76 FR 41424 - Finding of Substantial Inadequacy of Implementation Plan; Call for Iowa State Implementation Plan...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-14

... modeling requirement for this SIP call should allow for the use of the modeling protocol developed by Iowa... is making a finding that the Iowa State Implementation Plan (SIP) is substantially inadequate to... ) in Muscatine County, Iowa. The specific SIP deficiencies needing revision are described below. EPA is...

75 FR 6336 - Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Removal of NOX

Federal Register 2010, 2011, 2012, 2013, 2014

2010-02-09

... Promulgation of Air Quality Implementation Plans; West Virginia; Removal of NOX SIP Call Rules AGENCY... Implementation Plan (SIP) revision submitted by the State of West Virginia that removes West Virginia's nitrogen oxides (NOx) SIP Call rules. In the Final Rules section of this Federal Register, EPA is approving the...

40 CFR 52.142 - Federal Implementation Plan for Tri-Cities landfill, Salt River Pima-Maricopa Indian Community.

Code of Federal Regulations, 2010 CFR

2010-07-01

...-Cities landfill, Salt River Pima-Maricopa Indian Community. 52.142 Section 52.142 Protection of... IMPLEMENTATION PLANS Arizona § 52.142 Federal Implementation Plan for Tri-Cities landfill, Salt River Pima... the Tri-Cities landfill located on the Salt River Pima-Maricopa Indian Community near Phoenix, Arizona...